Abusive parents have captured my entire property and reg in their name

Sir, My maternal grandmother left a 2 houses in Kolkata. My mother has two sisters. One house along with 3 commercial properties is occupied by my parents while the second one is in possession of my eldest aunt. Both the aunts have not made further claims to the properties because of maintaining harmony. However they are now threatened.My parents are hell bent on possessing everything and passing it of as their own. Even a business started my me (being funded my grandmother who loved me) which turned out to be successful one, was taken away as it was registered in my mother's name. The registration was done in front of grandma based on the fact that they would take care of me. However when she passed away, everything changed. They overtook everything, left me penniless and started torturing me mentally. Even my friends and the other aunts are not allowed to enter the premises, failing which they face a volley of abuses and physical violence from my parents.