Civil suit

I bought and agricultural land of 2 acre in jabalpur, mp in 2010 from a person belonging the land since 1967. His name was continuously available in govt records since then. He sold the land as his inherited property to me. after registration of the land with regional registrar, when i appllied for mutation of land in local tahsildar office, One of his elder cousin brother objected the mutation and showing his right on the land on the basis of an registerd doc made in 1966 by his grand father on his name only, when he was 13 years old. there were no other children in the family that time. when the seller born his grand father introduce his name also, as he told. it is appearing in govt. records through an order no in 1967. As the details of the order is not available, therefore it is difficult to show to court on what basis his name got introduced and who introduced as owner and maintaind till now. by the time of last 6 yrs i could made mutation on my name but their brother are occupying the land and not giving physical possasion till now. additionally filed a civil suit against us that i and his younger cousin brother transferred the land on my name with the help of false papers. how can i get physical possesion, what is the future of this case and what i should do and how i should follow .... pl guide me thanx