Im a loyal GM customer, you could refer to me as a...

Im a loyal GM customer, you could refer to me as a GM Brat, as my grandfather was a GM Rep from the Doravillle, GA plant. I'm not stupid when it comes to GM policy nor procedure, much less about cars in general. I warn everyone to avoid bringing their car here for service. If I could give a "0" score I would.
My car was only taken to Jim Ellis as it happened to be the closest dealership to the Mechanic doing my brakek job, who found that there was a gas leak. The car had a cracked fuel pump/suppy which was covered under a Special GM Warranty.
They supposed preformed a multi point inspection (standard protocol for any vehicle in any GM service center), diagnostics inspection to verify the problem and make the warranty repair.
When the car comes out of the Service center, not only is the oil level dangerously low (less than 2 quarts in the car, I had to add 3 quarts to feel safe to drive the car!)that was not mentioned nor indicated on multi point inspection sheet, but the gas gages where not working properly.
Told I would need to bring the car back in to be checked as it was possible the fuel pump that was replaced was faulty.
They "examine" (a term I use loosely) the car and determine that it is now the secondary fuel pump that is the issue and quote me at $620+tax to repair.
Finally they agree on a discount for the repairs.
Go to get the car yesterday and they also replaced the primary fuel pump again, it had "fallen apart" while the mechanic was replacing the secondary, which they did not bother to let me know. I found it on the work up sheet.
Tried to discuss the oil levels low from when I picked it up Friday night, and basically got the brush off, a "we are sorry" and we will have to investigate.
Then I go to leave and find a cigarette butt in my floor board!
I do not smoke nor have I ever allowed anyone to smoke in my car! They "apologize" and say they will investigate!?! WTH??
I left beyond angry off (my staying to discuss the matter would not have ended well) and to make it worse my car reaks of cigarettes now!
I called the manager and she offered to have my car detailed. Like I would ever let them near my car again! They claim someone will call to discuss the matter with me....we shall see.
I had concerns bringing my car here in the first place because of other people I know having not great experiences, but now I know I will NEVER let them touch my car again.