1) you can issue legal notice to builder that you have already cancelled the booking but have till not received refund of booking amount of Rs 2 lakhs . request them to refund within 15 days failing which you will have to move consumer forum against the builder for recovery of amount with interest
2) if builder fails to pay file complaint before consumer forum and seek refund with interest
3) also compensation for mental torture undergone by you
4) please note that cases before consumer forum take 2 years to be disposed of