Romeo Chevrolet Buick GMC

I took my car into Romeo Chevy to get the engine service light corrected. They told me that the problem was corrected for $1000. When I took the car home, my code reader indicated that I had a permanent code, and the check engine light returned. I took the car back to Romeo and again they said that they had corrected the problem – this time for $650. Before I left, I showed them that my code reader still had a permanent code, and they said that I should drive for 100 miles to see if the code cleared. The next day the engine service light illuminated, so I called to schedule an appointment. They said that they could not schedule an appointment for another month. I asked to speak to a manager and was forwarded to an answering machine. As of this writing, I have not heard from him. I called the Chevy corporate office who said that they would contact the dealer, but it is a privately owned entity. I cannot get my Chevy to pass inspection.