I've had the worst experience with the repair shop...

I've had the worst experience with the repair shop for this company. The name has changed but the service appears to be the SAME as the previous, auto max. I purchased a car from them on July 24th and less than two weeks later it broke down and had to be towed for repairs right as I was reporting to them that it was showing signs of my transmission slipping as well as a few other things. Next, I had to literally act a fool to get them to give me a loaner. When I finally got one, it had no air conditioning and Texas weather was in the 100's! They switched it to one with ac but a hard ride and a gas guzzler! They kept my car for a month plus and it wasnt until I threatened to either get an update on what's wrong and a date of when I'm getting my car back or put me into something else is when I'm told my car repairs needed was being held up waiting on parts for my transmission which changed to needing to replace it to its nothing wrong with the transmission but its now my timing belt needed replacing and my rotors turned. Wow, what?? Transmission to engine and for a part my car don't even have. My ford fiesta has a timing chain, Richard!. But it gets better. In the next few days of it needing a timing belt, suddenly, its ready to be picked up. Repairs done. Well why?? when I asked for something in writing to show what they did, Richard, the so call manager of the shop said since I didn't pay for repairs there is no paperwork. Who does that? I asked him to Create something to list of what was done and he refused! Shady people like auto max now MEI one in the same should not be in business. My car issues were still the same as you know it would when i got it back and now its is with Ford who has confirmed that none of what I was told that was done was not and I have it in writing! My car does have transmission problems amd still under warranty so won't have to pay however do you think this will make any difference to them, i.e., me knowing they did nothing after having my car for over a month! No they don't. They have no integrity! The business is designed to take peoples hard earned money and screw them over! I will not rest until I see them out of business!!