Trying to break Agreement of land

File suit for specific performance as you have paid the earnest money against a proper receipt. You should get an immideate stay on the sale of porperty.

Decide as to what you wish to have as a priority--Land at any cost with expensive and undue delay transaction of land or just getting a refund of the amount with some compensation and live peacefully.  .  Whether such a white paper agreement is valid under law and further remedy you wish can be sought from a local advocate.