Default of agreement

I made a deal with mr. Junaid haider of alqaim estate for a sale of plot in dha-6. Last date agreed
For the sale has passed. Bianna of 2 million is held with me. Why is the legal course. Kindly advise

What most of the dealers do is give you a Bianna from there own pockets and start searching for a buyer with a higher price making 2 deals at the same time.

Legally if the date has passed its your money. To make your argument more secure give him a written notice and make sure to keep the copy of the notice signed by him.