There is no need to pay extra 20% for the carpet area change and excavation charges as you are only supposed to pay the charges which were agreed upon when you had booked the flat and you and the builder had executed the builder buyer agreement. 

You can file a complaint against the builder in consumer court for deficiency of services and unfair trade practices adopted by him and can claim possession/refund, alongwith interest for delay in giving possession, compensation and litigation expenses.

Alternatively, you can also approach RERA and file a similar complaint against him.

A complaint must be filed against the builder in the RERA TRIBUNAL immediately.

It is not necessary that the project must be registered with RERA. Although registration is mandatory but some of them don't do it. File a complaint.

Builder is bound to register project with RERA 

2) complain to RERA against builder taking 45 per cent of sale consideration and not registering the project 

3) you can also cancel booking and seek refund of money paid by you with interest as builder has not proceeded with the project 

As the project is not registered with RERA, you will have to approach consumer court for the same as advised above.

Regards.

You cannot expect any progress in the constructions anymore owing to the fraudulent acts of the builder.

Moreover he is reported to be running between courts, jail and litigation, you cannot expect any fruitful result at the nearest possible time.

Therefore you may cancel the booking in writing and intimate the same to the builder and demand the return of the booking amount owing to reasons of inordinate delay in constructions. 

After that you may resort to legal action for recovery of the booking amount if the builder is not cooperating

The builder may not respond even to the legal notice issued to him by registered post neither he will obey the orders of RERA also since he has become a hardcore person after visiting jail for more than once.

Hence you may have to get into legal action recover the booking amount.

Sending communication through emails would not fetch you any favorable result, just forget it.

You may consult a local advocate and take legal steps in this regard.

It's illegal to later increase the said price. You can go to consumer court against him. You can also go to rera for non registration of project of they have completed the period

File a compensation case in consumer court 

File Complaint Against Builder before RERA . 

You can file complaint before district consumer Forum and Seek orders and claim Compensation for mental agony 

You can approach before Consumer Forum. 

- As per law, if buyer paid 10 % booking amount , then the builder is bound to execute a registered sale agreement .

- Since, the builder is delaying in the garb of clearance etc, and further receive more amount from you in the name of changing in carpet area , then legally you can cancel the booking .

- As per the RERA Act, if the builder is delaying in construction & delay in possession, then the builder will have to pay 10% interest on the value of the property for delayed possession of flats.

- Further, even if you get the possession of the said flat lately, then also you can claim 10% compensation from the builder. 

- Further, as per Real Estate Regulation Act (RERA), home-buyers can cancel allotment of the apartment booked with a builder at any stage even if there is no default on the part of the developer. The builder is bound by law to return the money collected from buyers within 45 days, after deducting the booking amount.

- Hence, if you have already paid more than or 10 percent of the flat value, and the said agreement signed by you , is not registered in the office of the Registrar , then you are liable to get full amount refund paid by you ,even there is a clause present in the agreement for not refunding  , and if the said agreement is registered , then builder has right to deduct booking amount from the paid amount. 

- If, builder not refunding the same ,then you should lodge your complaint before the Consumer court , and thereby prayed for the refund of paid amount with interest and compensation as well. 

Better file FIR and consumer complaint for fast recovery and compensation. 

Also complain to RERA for refund with interest.

Please issue legal notice to resolve your grievances and then initiate injunction process against the builder as the process is out of jurisdiction of RERA proceedings because of non- registration of the project under the RERA project.

Since RERA The  Real Estate ( Regulations and Development ) Act came into existence in 2016 hence your project is out of jurisdiction of RERA authority. 

You may approach Civil Court for temporary injunction against the Builder under order 39 and section 151 of C P C 1908 for alienating, creating third party interest to anyone by self or through their agents. 

You can file a complaint in RERA through online.

Regards

Approach the consumer forum and file a consumer complaint in this this matter. Seek refund with interest.

Additionally, lodge a FIR against this builder for cheating and. Criminal breach of trust 

1. File suit for cancellation of flat and recovery of money paid to him with interest.

2. You can file suit before RERA or civil court. 

3. Hire an advocate for filing the suit 

Issue notice to the Builder seeking refund of the money paid and seek damages for delay.

If the project is not  registered with RERA you cannot go to RERA.  

Further, it needs to be explained  as to why you waited for more than six years without raising issue.  If you have already written to him using the correspondence, you can initiate proceedings against the builder for recovery and damages by cancelling the booking.