Dear Mr. Anand,
I suggest you to send a notice to builder asking for refund as the deadline has been crossed and has not started the construction. If he fails to respond to the notice positively, you can approach consumer forum. You narrate the entire facts of the case and ask for refund (as the deadline is crossed and builder has not started the construction) along with compensation.
It is advisable to seek help of Advocate to draft notice and represent you in the Consumer Forum.
Sandeep Hegde
Advocate
Bangalore