Auto repair service near Bridgeton, MO

Our car is two years old and had about 10,500 miles on it at the time this happened. Auffenberg Hyundai changed our oil and did not put oil in the car before letting my wife drive off. She drove 2 miles. She took the car back and they basically put oil in the car and rushed her out as to keep things quiet. After I got involved they wrote a letter stating Auffenberg will cover the engine to 100K miles but according to the warranty if I have a problem and have to take it someplace else it is not covered if it is deemed lack of oil is the cause. I asked them if they would do a complete engine tear down to inspect and they stated that if they did not find anything wrong they would charge me $2000. I then asked for a new engine. They said if they did that it would be a "Like Kind Quality" (LKQ) engine. I later found this meant it was going to come from a salvage yard. This is all for a problem they caused. And in the end we still had to pay for the oil change! Do not use their service department! Or for that matter buy a car from these people!