Missguide from seller sale flat to 75 % old age man and his family

To i m 75 yrs old i give token amount to party who want to sale resale flat , after investigation his flat and other soc members flat are in collector land property which other members selling flat unauthorized with out collector noc so collector not give permission without solve this matter , they said u cant buy this flat now , after matter resolve u can go head , prob is that i m 75 yrs old i dont have house i stay in rent house , already 120 days gone waiting for replay , seller already have own flat he stay his own house but he is not understand my prob i want to quit now my rent flat how can i manage i want to buy flat early just because my rent gone so need flat but this seller is not taking any action for my temporary stay how can i gent my money if she dont want to sale , he is not answer properly , i sign one mou beetween me and party now he is not ready for deal , party is forcing me to do stamp duty and finished i dont want to do any illegal work this party , how can i get justice from this fraud seller GUIDE ME SIR EMAIL ID