Abusing and defaming to leave house

Around 1994 my father's parents died and by mutual distribution some amount was given to my grandmother nd grandfather to buy another house.At that time only my father was working as a salesman in few shops.And soon my grandmother bought a house in her name.My father has 1 brother and 3 sisters. Now my grandmother is abusing my mother,father me and my siblings stating we are witches and we are doing some sort of "jaadu tona".She is doing since 31st dec 2014.Also she claims that we have stolen approx 30 lakhs (FD,cash etc) from her almirah and approx 50-60 lakhs of gold and silvers(of which she has no proof) and to be honest she never had so much wealth.My father has been working since the age of 16 ,but according to her he doesnt have right on even one spoon.She wants us to leave this house and take nothing with us.She is torturing us mentally too much.what should we do?If we leave the house then can we claim on it after a year or so?because after a year I'll be having a job and probably mentally stable.Also,can she give the property entirely to her other son and daughters?