Healey Hyundai

I went to the dealership for a simple maintenance engine oil and filter change. I went to pick up the car after the oil change was completed, and the car started strange, then I saw a large puddle of oil under the car. I'm not sure how they didn't notice this when they drove the car out of the shop. I reported it to the service department, and they took the car back into the shop to correct the problem. I also checked my oil level later and realized that they overfilled the engine oil level by over a quart (could cause potential engine damage), which I had to rectify. They also did not clean up properly and left oil in the lower engine splash shield, which is causing oil to be now dripping over my garage floor. They are supposed to be experts so one would expect that they check their work to ensure that it is completed properly. Hint: Check the oil level before leaving the dealership, to make sure it's not overfilled.