What legally can be done after I was falsely accused of stealing and was assaulted by the manager?

I went to a store to return a 40 inch flat screen TV late last night so there was only a handful of customers. I entered the store pushing a cart with the TV in it and my receipt of purchases in hand, walk to the closet, open the register band and began the return process with the cashier. She took my receipt then began to remove the TV from box to match the serial numbers from receipt to the TV. After it matched, we began to place it back to the box then she returned to register to give me my refund. A manager confronts me while I’m at the cashier and began to tell me he saw me walk from the back of the store with the TV and I tell him ha ha funny, that it was a joke. He raised his voice and repeated it. I told him to go check the cameras and he would see me enter the store. He verbally assaulted me and then got real close to me and put his hands on y chest and did make an easy push. It lasted for at least 3 minutes in the cashier area. I mentioned to him that she had my receipt. He even called me a theft. I ask him if I was being detained or am I free to go. He advised me that I wasn’t leaving then. I had to tell him that he was caught in a lie because I have my receipt then he released. He refused to give me an employee name or number telling me to leave the store. He wasn’t doing business with me because I was acting like an ass.