Cancelation of registered agreement to sell

1) I enter in to an agreement (registered), with a condition of sale deed will execute within a month from the date of reciept of NOC from ahe bank. 2) NOC received on 02/04/ 2024 and handed over to purchaser on 03/04/2024. 3) Meanwhile some disputes regarding irrigation matter arises, and looking to the future I decided to revoke agreement. 4) on 30/04/2024 purchaser telephonically asked me for saledeed. That time I made him aware of my intention regarding cancellation of agreement. That time he agreed and It was decided to refund earnest money with intrest. 5) Then on 04/05/2024 I received a legal notice from the purchaser stating that saledeed should be executed within 7 days or should refund 50% extra amount against earnest money. 6) Reply has given to his notice by stating my hardship of irrigation dispute and it is also mentioned that this agreement is cancelled and earnest money is forfitted as u failed to perform the saledeed within stipulated period. 7) In d above circumstances Can I enter in to an agreement to sale with another buyer as he has not proceeded in d court. 8) what may be ground to sought relief for cancellation of agreement in eye of law Regards