A change or rectification in the documents can only be done by the registrar office.  Engage an advocate who will do all these things on your behalf.

Regards 

You have to make an application to district registrar for correction of entries in EC

2) enclose copy of sale deed wherein wrong number  are mentioned

3) after verification of records the entries of your land would be rectified

You need to file the rectification application in their records that is sub registrar or collevtor office

If you can't visit registrar office for rectification of details in encumbrance certificate then you need to contact some agent pay him the fees and get the details corrected.

See you need to get the certificate rectified as entry is wrongly made.You need to make an application before the office for changing I.e rectification of certificate you can engage local lawyer for same.

Normally any transaction which is registered will get reflected in the Encumbrance Certificate (E.C). At times there might be missing entry in the EC. This can be stated to the concern Sub-registrar and he/she will issue a fresh corrected E.C. Get it scrutinized by a good property lawyer in your locality. 

Hire local lawyer, he will do the job. It is just a error committed while entry.

From where did you get this information?

If you want to rectify the same then you may have to approach the registrar's office and submit an application by attaching the copies of the documents and request for rectification of the entries reflecting in the EC. 

Dear Sir,

It is a property related matter a such you should not Neglect the issue .

You may please go in person or send someone on your behalf with your authority letter and see that necessary corrections are made.

You may file representations before Tehsildar/Mandal officer, Assistant commissioner/ RDO and Deputy commissioner/Collector .