My father sold his properties in a village, now a local guy threatening my father to pay

Respected Lawyers My father sold his properties recently but after the sale a local village guy is threatening my father to pay him money before leaving the property / village, and has illegally occupied back side of the house "Kottige" Property: My father bought this property (small land and house in the village) in 2010. Local Guy: A "local guy" who was working in a coffee estate, whom my father knew before when he was also working in the same coffee estate approached my father in 2015, and requested for help, he requested my father to allow him to use the land for a yearly fee, to which my father agreed, He slowly started telling everyone in the village that my father asked him to leave his job at the coffee estate and come and work for him, also he started telling that my father has promised him to give some land and money, this "local guy" started asking money from my father for buying fertiliser, seeds, and this "local guy" also started using backside of the house "kottige" for tying cows etc... Agriculture: From 2010 to 2015 my father did agriculture with some labour support locally, but since he was reaching 70 age and a "local guy" approached my father that he will use the land for agriculture and pay my father a fee per year. This local guy used our land for agriculture in year 2015,2016,2017 and My father stopped him using the land for 2018, but then he agreed for this local guy to use the land for 2019, 2020. and stopped him using the land for 2021, Issue: Now this local guy is threatening my father to pay him money else he will not let them move out of the village, he is threatening to kill them. and also illegally occupying the backside of the house "kottige" My father went to local police station but this local guy with some support from local gundas also getting police support, police are refusing to take my father's complaint. Also this 'local guy' is using his caste / community and claiming that my father being a Brahmin is cheating. We have not been able to find a good local lawyer also. I am the only daughter and my parents or very old age now, I live away from my parents and can't travel easily with this COVID situation, I am worried for my parents health and for life. what can they do, what can I do? Thanks.