How do I sue my landlord for his illegal actions?

Verbally insulted and harassed by landlord and daughter. Entering my room without permission or notice on multiple occasions. Paid rent and told two days later I had to get out and my bedroom door was removed and the ac window unit as well. No central heat and air in house. Also it's a rooming house. Sheriff dept has been out to report this twice. Landlord has also offered money rewards to any tenant that can get me out. I’m in desperate need of some help