Inhertance

We are Christians. My father passed away in 2016. We later find out that out my dad's property that my mother’s father had given him of 1.50 acres had been transferred to my fathers brothers name some weeks before his death. When questioned, my fathers brother has been promising my mother and my fathers 3 kids that the property will be given back to us. It's been 6 years yet he has not yet transferred the property to us. Now, 2022 my fathers family is doing the partition of their family property . My Grandfather (Father's Father) who died with no will, he has left land in Kerala, Pune, Bangalore and two apartments in Mumbai for his wife and 4 kids in which my father being one of them passed away. so they are left with 3 kids and wife(my grandma). According to ancestorial law I am aware me and my two brothers and my windowed mother has rights to my fathers share of his fathers estate. My fathers brothers are threatening and emotionally blackmailing us to only give us back my fathers 1.50 acres of land which holds emotional value to us if we accept the unequal share of our ancestral property they are willing to provide to us. My fathers family is only willing to give us a small land in Pune that is under my grandmas name for the partition and threatens we should accept it and sign a legal document saying no one of us will claim any further properties as listed in the future. Please advice on management of the given situation . Email : [deleted] Number : +[deleted] USA whatsapp : +[deleted]