Sir/Madam.a person belonging to SC community is constantly threatening me of Fake SC/ST case.

Sir/Madam, A person belonging to Sc community is constantly threatening me of fake SC/ST case. He is doing the same from the past few years. We tried to evade any legal path as we know that SC/ST act is too dangerous. Sir, that person has been forcing us to do things for his benefit. For example, He was given a parking lot in our apartment. But after few years, he broke the walls near the parking space and demanded that our parking space should be merged with his. Sir, we thought of filing a case, but , again our case would have been too weak in front of SC/ST case. So, we had to vacate our parking area and now we park our vehicles in a nearby area by paying extra money. Sir , that person used to constantly spit tobacco on our main door. When we requested him not to do so, he again threatened us of fake case. Sir , he also abuses my family too much. Sir , we are being mentally tortured from.many years. We can't even file a case against him as he has connections in local police station and even high court. Please suggest a remedy.