Agriculture land

My grandfather was Pujari of our village mandir and we got Agri land gift from raja rajvada, main kabjedar was my grand father in first entry.after my grand father passes one bad thing man (who also have another agriculture land have been) wrote his name in record in 1969. in our family not any faced to them. They paid hafta of rs 519 and becoming owner and our name removed from record , I have question that Mandirs land are liable to names of other people? I heard that Mandirs land not sell or name to other so now what I have to do? And opinions of yours that for mandir related land act if any please help us.