Enterprise rent a car Overcharged for damage i didnt commit to vehicle Galveston texas

I had rented a car for the week and when I arrived the vehicle was not at the location yet. So I was upgraded to a Jeep Wrangler with a slow leek in the tire. I had the tire put on the back and the back on put on vehicle. I told them about it so the the next person wouldnt have a problem, they said they would check it out. The next day they decided I needed to repair it and they charged me over $130. I paid it and now Ihad a corrola. When I brought this car back it had a black mark on the lower back passenger door. Which I didnt hit anything I dont know. So the manager said it didnt go throgh the paint so it wont be a problem should just be buffed out. So I said I would take it to be fixed because I learned my lesson from the tire. But they assured me it was no big deal so I gave it to them to take care of. (didnt learn my lesson I guess). So now im getting calls that it cost over 900 dollars for a black mark on a door which I have pictures of and going to contest. Waht a rip off.