Drivetime Chattanooga Ugly duckling gave me a lemon of a car, refused to fix Chattanooga Tennessee

Went to Drivetime seen a rep. about a car, the first one was a lady and made some promises to us about the car and payments. Another sales guy took over and changed things from what we were promised by the new lady rep. We ended up because of our credit paying $2500. down, and then payments were $475?..... anyway we had the car a few weeks and it wouldn't run. Had to buy a new battery at Sears, where they told us to go for all problems. Also for 1 years oil change for free. The few months down the road we took it back telling them no air, no heat, using oil and jumping feeling, not really wanting to pull. They did nothing, said it was our worry. I quit paying them and they came and repossess the car from church one morning. Took my purse and all belongs in my car. Took several days to find my purse and retrieve them. The car was a total ripoff....it was a selling price around $17,000, and with the interest they put on it, it was gonna cost $28,???,00. They have the car and was in great shape, just would not run right. They resold the car so I was told, and now put $11,000. on my credit report so I cannot get any credit or another car. So they want that car payed for twice.