Should we leave our father and grandmother

Hiii... My name is Bipasha. I am 22 years old persuing BA(hons)in English from manav Rachna Faridabad.... My Father and my grandmother is not leaving our family, even after trying soo many things to try to get us out of the house. My Father drinks everyday and fights with his own mother just to show us that he is in support of us but actually he is not.... Yesterday my grandmother even tried to kill the whole family by turning onn the gas stove and claiming that she didn't know who did that, she didn't even get the smell of the gas stove but the whole society did.. They are the criminal minded people who are trying every possible ways to get me and my mother out of her own hard earned money house... My Father firstly do not even a single thing that can be called fatherly for his wife and children and also he orders and rules on us... He is a selfish being who was not even cared if his children could die if the gas stove was onn a little bit more.. why should we keep such kind of people at our home... My mother is asking for a divorce from my father, but he is not ready to do even that knowing the fact that then he would be having no shelter to live with his mother. He is forcefully sitting at home, and trying everything to throw us out on the roads.... From my childhood he has tourtured my mother mentally and physically and now my mother is in a old age, she can't take care of every expenses of the house alone , even the high paying expenses are being also look after my mother because my father is not ready to spend a single peny on his family, but on himself in drinking everyday.... From the fees of my college and my sister's school, EMIs on different necessary things , to bringing even medicine to the home, everything is looked by my mother..... He is doing everything for his own selfishness and happiness sitting at home and even tourturing my mother.. Please help me what should I do... It's getting really uncontrollable and unhandling situation everyday ...