Banned from a dealer

As some of you know, I have had many problems with the dealer I bought my car from, especially about the paint. Recently, I finally had them agree to fix my lip spoiler and a chip in the door they caused. I gave the car to them and they took it to their body shop while I got a rental paid by the dealer. Today, I went to pick up the car.

I took a look at the car. The corner of the lip spoiler where they had damaged it was fixed but everything else was the way it was or in worse shape than when I brought it in. They had applied the spoiler incorrectly before I bought the car and it was still on wrong. I assumed they would take the spoiler off and repaint the whole thing, but all they did was tape it off and did that one little corner, maybe 2cm x 2cm. On the rear bumper, they left a scratch about 3 inches and a scrape just below that. On the passenger side door, they chipped the paint similar to the driver side door and they put a bunch of touch up paint on it. It looks awful. They tried to touch up the driver side and although not as bad as the passenger side, it still is pretty bad. When I told them about the extra damage, they told me that I had done that.

I had checked the whole car before I left my house and I took pictures of all the damage I could find. All the ones I had mentioned were not there before dropping the car off. They claim that they took pictures of the car after I dropped it off and that the damage was there before they touched it. I asked for the pictures and the lady said she'd have someone email them to her. I couldn't take it anymore and I started yelling and cursing at them. She called some other service person over and they were both telling me that the paint damage was there before they touched the car. He went inside and came back out and told me that I was no longer welcome back into the dealership at all for service or anything else. I laughed and said **** you.

I called a lawyer and she recommended I contact a person called Clark Howard. The service lady kept bugging me about giving back the rental keys and I gave them back after she said that I would have to pay for another day of rental if she doesn't have the keys. She also kept bugging me to sign the service papers so I would leave. The lawyer said I should sign the paper but write on the bottom what I mentioned above. I wrote that and signed and the service lady wrote that she tried to show me pictures or something. I didn't read what she wrote but signed off on it anyway. (I couldn't think straight. Just wanted to get out of there). I took my keys and left.

Also, when I bought the car, I pre-paid for maintenance for three year (which was very very stupid I know. please don't post about how dumb that was) and seeing as how I am banned from that dealership, I want my money back. Should I make them pay me back for that? I am left with a car that has scratches and swirl marks of a 10 year old car and the perpetrators who damaged my car are total ass hats. I definitely plan on taking legal action. What are my chances of winning what is owed to me? They are probably going to use the fact that I drove the car and I did it as a defense.
How can I make the dealer suffer? Am I allowed to post signs and stuff like that informing people of the crap that dealer hands out, as long as it is truthful?

Quite honestly, I know it's the dealer's fault but this experience will definitely keep me from buying another Kia. I love my car but this is unacceptable. I will be contacting Kia Corporate and see what they do. This car was made in my birth country and I am ashamed that there are dealers like this that Kia would sell cars to.