Sale deed time period

Unregistered sale deed ..... Respected sir In 2007 we agreed for buying 10 acres land 70 lakh from vendor Immediately we did unregistered agreement With 25 lakhs He told land papers 2 acres assigned land and 8 acres registered but But it's completely fake 2 acres registered and 8 acres assigned lands Is actually My father is illiterate so they faked easily... After 3 years our father asked him "You told me 2 acres assigned land and 8 acres registered" It's completely fake Now I go to police station Vendor requested my father Please forgive me 3 years completed so again we both write agreement same old papers Same like Complete again he had cheated my father He was bank employee on that time Now he retired from bank Job when he got retirement benefits immediately he told my father ...."I don't give money" Completely cheated my father He doesn't give money What can I do sir Please tell me !! My omnipotent ????? Supreme court one case details Please check this link....???? https://indiankanoon.org/doc/70327981/