I want to sue my landlord and am having trouble finding an attorney. Possible illegal eviction. Help!!?

Ok, here’s what happened. I turned in my 30 day notice and one day while I was in the process of moving out my landlord walks right in unannounced stating he was unaware of my move out. I told him the notice was left in the office drop box (where I always put my rent). He went on to say that if I could be out by the 15th and to only pay half the rent. I told him I was unsure if I could be out by that time. I came by on the 13th and he was in my apartment claiming I had abandoned the property and failure of paying rent. He told me he already called a towing to put my belongings in storage. I called the cops but they were of no help. We came to an agreement that I had until the end of the day. Later on some lady comes by saying she has already rented my apartment. An hour later landlord comes in AGAIN and starts cleaning upstairs portion. Now I owe him 400 in damages where he overcharged me on a pair of doors, light fixture, and other things. I live in Texas. What is the law on that??