Got a call 1/25/19 from Texas Auto Center where I bought my car 1/23/19. It was Carlos the guy who sold me the car saying I needed to come in to resign paperwork bc there was a mistake in the original paperwork. I asked what was wrong and he said he'd go over it with me when I came in. He asked when I thought I'd be coming. He sounded urgent. I said I wasn't sure bc I was at work. He said OK. I was suspicious bc it seemed he didn't want to let me know what was wrong but wanted me back in ASAP. I knew that could only mean money. After running it by a coworker he said if he doesn't tell you just dont go. I decided to give them another chance so I called and said I couldnt make it after work so to tell me what's wrong so if its urgent i can plan accordingly. Carlos said he had to get with finance and would call me back in a few minutes. I never got a call back. So I went there in case something was an emergency. Before going in i made sure to have a witness on the phone. Carlos sat down with me and said the mistake was to the interest rate. I got 14.09% and he said it was supposed to be 16.9something(basically 17%). I said that doesn't benefit me so im not signing. He said he had to talk to his manager. A few minutes later he comes back with a woman who explains they're must have been a glitch in their system. All their vehicles have to be financed at a certain percentage. She said they would give me a full tank of gas for the mistake. I asked what would be the outcome if I refused to sign bc I wasn't going to resign a contract that didn't benefit me. She said they would give me a refund and take the car back. I told them that was fine. I'd take the refund and contact an attorney with my original contract. They went back to the manager. After a few minutes Carlos came back and said the manager said everything was fine. I could keep the car at the outlined 14% interest rate. The company then tried adding the interest without my knowledge so I had to contact an attorney. They have also made claims that they had not received payments but because I keep receipts I was able to prove I had paid and in fact paid early. Most recently I began having issues with the vehicle after only having it a few months. September I took it in and was told I'd need what amounted to to tune-up that would cost $694.73, which upon pickup the vehicle immediately after the repair I noticed a high pitched whine coming from the driver side whenver I would accelerate. About a month later I began having the same issues with the vehicle. I took it AutoZone and had them get the OBD code for me and it came back P0420 for a catalytic converter. Turns out this is covered under the warranty through the dealer as I have not had the vehicle 24 months or driven 24K miles. In fact I have not even put 4K on the vehicle since February. I would only have to pay $200. I asked for the original diagnostic and still have not received it. Instead I was given an invoice. I have also asked if it was the same symptoms why hadn't we done the catalytic converter in the first place. I did not get a direct answer. I was told the catalytic converter wears out over time and use, so I questioned that this more than likely was within the vehicle before I bought it? Again, I did not get a direct answer. I believe they sold me this vehicle with these issues and are looking for ways to continually charge me for things because I would not resign paperwork at the higher interest rate as they requested.