Father mortgaged land to his friend now he is not willing to return it

Mere dad ne ek agreemnt kia tha pese le kar plot ke paper unke frind ko diya tha mgr jb pese dene gaye to usne mana kar diya ki mera plot he or usme mom dad ke sign he to jb dad ne wo plot 22 year ke bad sell other party ko kiya to usne court case kar diya ke ye mera plot he tum ne kyu sell kiya wo agreement 1986 ka he 10 rs ke stamp pe or uske pas kuch nhi he ok to me ye case 8 sal se chal raha he or mujhe kya karna chaiye kyuki case final dicision pe hoga 2mnth tak