Land Dispute on our restaurant land which we bought 50 years back

My grandfather came to city from village 50 years back and he bought a piece of land from the landlord. at that time there was no legal formalities for land so he bought that land on kacche papers. everything was going fine but 12-14 years ago the son of landlord came and ask to return the land and he filed case in the court. we lost the case in lower court and then we appeal in session court and we won there. he then filed the case in high court and hearings were going on and 2-3 months back on the hearing honorable judge said that decision is decided but will release later and now 3 days back the decision came out and we lost the case. can anyone please help in this case as we are doing our business on this land from last 50 years and the water bill, light bill is on my grandfather's name but we dont have any legal papers for that land. can anyone please tell us if we have to apply in supreme court. we were thinking that we will win the case in high court also but we dont know what happened in that 2-3 months that we lost.