1. You are silent as to whether any written agreement for sale was executed or not.
2. If yes then it would be easier for you to get relief.
3. However even in its absence you have good case at hand.
4. Since you have proof of payment, you can now file case before the consumer forum for the purpose of execution and registration of proper deed of conveyance including delivery of possession of property.
5. In the same case you can claim for compensation and damages as well.