My uncle and my grandmother are not giving us share in the property and threaten us every time.

I have a father and a younger sister in my family. Just a few months ago my mother has died and because of that my father's health is not good, due to health issues he is not able to work properly then we thought that Staying in our own house by leaving rental house. But we have tried to do this earlier too, but our grandmother, uncle and my aunt get together and harass us in different ways like file a police case against us with wrong and strong reasons and meet with some big lawyers harres us and my father and taking signature of my father in wrong papers. Abusing my mother's family and my younger sister. For some days we have come here to stay at the same house due to Lockdown. but in such a problem, she still use abouse words for my sister and asking for money every time for this property. We do not have any calamity from our grandmother, but we should get what we deserve, but our grandmother and our uncle don't want to give us part in the house and land. please tell me what can i do in that situation.