That is really sad to know bete. What role does your father play in this? Your grandparents? Are you in a job? Can you think of moving out of your own home for a while - maybe with some PG or friends or other family members - where you can be of help to them as well as regain your own peace of mind?
Maybe you want to talk to a counsellor - online/ call?
https://lovematters.in/hi/domestic-violence-india-lockdown-how-to-get-help
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That is really sad to know…