1) father cannot unilaterally execute deed of cancellation
2) once gift deed has been executed duly dtamped and regd yiu would be absolute owner of property
3) you ought to have moved court to set aside deed of cancellation executed by father unilaterally .
4) it is doubtful you would find a buyer for the property during pendency of your court case
5) you would not get full market price of your property
6) avoid selling property now