David Stanley Chrysler Jeep Dodge Sells lemons Midwest City, Oklahoma

I purchased a vehicle from this dealership on 9/27/12. I began having issues with the vehicle immediately after so i took the vehicle back on 10/5/2012 for drag starting, jerking, and pulsating breaks. The dealership kept my vehicle for 4 days and couldnt find the issue. The dealership told me not to come back for 30 days when the warranty takes into effect. I took my vehicle back on November 9, 2012 and they stated that there was nothing wrong with the vehicle. On 11/16 my vehicle began jerking and the engine light came on. The dealership kept my car for 5 days and stated that the issue was the thermostat housing unit. The repair is 600.00 and they will not pay for it nor trade it in because they said now i am upside down.