Harrasment by in laws

I got married two years ago. My husband and my father in law are torturing me so much. They always trap me. They speak all lies. They are spoiling my name in the society by spreading bad about me. I am emotionally drained and depressed. My husband had beaten me so many times. Recently we abused each other on phone. He recorded everything which I spoke and I dint record anything. So they are sending that recording to everyone and defaming me.that recording is against me. We don't have any proofs against them with us. So they want me and my family to sign on paper which states that. I and my family have abused them so much and harrased them and removed their prestige and if something happens to me it's not their fault and responsibility. I have to obey to all their orders and do what they say from morning to night. If we sign that they will accept me or no. What should I do? If I file a complaint in police station. Will that evidence against me works in their favour? Can I claim half of their property after I file divorce? If I don't have any proofs of mental abuse, verbal abuse and domestic violence? How does it work? Will they be imprisoned?