I had made a MOU to sell my property/ flat on 28th March 2019.
Buyer had paid me INR 300,000.00 (Three Lacs Only) till date as advance amount. (Sale value agreed for INR 34,25,000.00) I had given all Flat Documents (Xerox Copies) to avail loan.

Now on 26th June, the validity of MOU get completed.
Is this deal get cancelled ?
Should I send letter / mail to buyer regading cancellation of deal ?
Can I deduct any amount while returning advance ? (Not mentioned in MOU)
Can I returned the money in installments ?