Blackmailing and mental harassing to all my family members and me too

I am a victim here as one neighbour men wants to marry me but i rejected his proposal as he is only having eye on my money and on my parents property so when i got to know all these stuff i rejected and know as he is my neighbour he started to blackmail my parents and to my all family members. He is also using abusive language with my family saying hw will throw acid on my if i will not marry him.. And he will kill me if i will not accept his proposal. And laws and police are also taking his side because he is having some political relations.Once he was stalking and caught him in train and informed the police and he arrested him but he got bailed and again he started doing all that harassment/torture to me and my family.. He is also misusing my photo with him for bad things showing to all the society people and he wants to down my family reputation. And inspite of doing all these things he filed a fully unknown case against my family which we are not even known for.. I want justice and want to live life peacefully he is mentally harassing me and mt family too.. What shall i do with these men. I want the answer and the case ipc act and what will be the procedure to handle these kind of men