We entered into a sale agreement (Ajmer, Rajasthan) 5 years back and took an advance as well. It took longer than expected to get the documentations ready. In the meantime the rates have gone up. We would like to review the agreed sales price or cancel the agreement and are ready to give back the advance along with any interest. The sale agreement was made on stamp paper and notarised; it was not registered. There is no exit clause in the agreement. Can we still cancel the deal?