Property division

Hello, my name is yash jaiswal. i am hindu .My father are 4 brothers. My grandfather died in 2002 . my grandmother is still alive she's very bad mentality women. keep these points in mind - 1. my father is 3rd elder brother among all 4. 2. my eldest uncle has died ( eldest among all brothers). my grandmother is very jealous of my father's reputation and fame in society. my father was the favorite son of my grandfather. after his death my grandmother started acting ill mannered with my father and mother. my question starts now. our family was having a shop of area about 40 ×50 foot in main chowk area. our family was having the shop was on rent or lease for over 30 years. all the brothers were having their share in shop . after my grandfather death and my eldest uncle's death the other two brother throwed my father out the shop . with their money power they bribed police and magistrate. then they crushed my shop and took possession. after 1 year they got legal registration of shop as i told it was on rent. is there any way we can demand our share legally? 2nd question. my father was having only one house in which our whole family use to live .there was another house which was disputed between my grandfather and another person who was on rent in that house. my grandfather sold our original house and purchased the disputed house. But the man who was on rent was not leaving the house after a long case we won and got possession on whole big house.AND THE HOUSE WAS REGISTERED ON MY GRANDMOTHER'S NAME AFTER WINNING THE CASE. After that out of 4 son's three son's are living there including my father . one son has build his seprate house. suddenly my grandfather died due to paralysis.NOW MY GRANDMOTHER AND HER YOUNGEST SON ARE MAKING MY FATHER TO LEAVE THE HOUSE . WE CAN'T GO ANYWHERE BECAUSE WE DON'T HAVE ANY PLACE TO GO . my father had initially given only 1 room out of 32 rooms in the house .can we demand our share in that house ? we are living there for more than 20 years . we dont have other house to go.my father has not got anthing out of all shops and they are forcing us to leave house also. Can we ask for legal share. PLEASE TELL YOU VIEWS SIR .