Senior citizen rights

My mother is 69 years old, my father passed away in 2012. He left the entire business in my mom’s name. I got married and divorced . Me and my mom use to live together in the rented premises, my brother and his wife and kids use to stay seperately. Their married life was never smooth, my sister in law went to CAW cell , after mediation in court she returned in 1.1/5 years. After returning they shifted to our premises.For sometime she stayed fine, again her abuses started. The landlord asked as to vacate because of this. We shifted to different Appartment , and she stayed nicely for sometime . Now again she has started abusing , provokes to fight, threatens my mom to give the business in her name, throw me out of the house.My mom has even made a complaint in the police station, called the PCR, but police officials have not taken any action.Being a senior citizen she is being harassed everybody. My brother is even filing for divorce. But right now my main concern is my mom, how can she be saved from the trauma and harassment