My grandfather use to live in pagadi system room in labaug parel in mumbai which was not in his name but the light bill & ration card was in my grandfather name stating the address of the room. he died without a will. On basis of light bill my uncle name was put on the rent receipt in 1981.Now the rent receipt is in my uncle name but my father was not aware of this till last year when my grandmother died.Now my uncle is not willing to give us our share in room.Do we have any chance of getting our share legally.