Quodlibets: Car woes

I've spoken here before about my car, and the problems I have with bringing it in for service. But this last time (last Weds, Thurs, Fri), takes the cake. The service was just BAD. The service representatives TWICE called me at the wrong number, once with an estimate of when my car would be done (meaning I called the place panicking and needing an estimate of time, to make plans for the pick-up of the car) and then when the car was actually done, meaning I sat at work waiting and waiting until the last possible minute to pick it up, because I had to call and ask if it was done at the last possible minute I had to do so. The baffling, mind-boggling thing is that both of those wrong calls were made to different numbers. And then, I waited 20 minutes for my car to be portered out, and when it came out, black, sticky gunk was all over the driver's seat. Suffice it to say that the gunk was not there when I brought the car in. They cleaned it off, but that meant that I waited, in a state of absolute pique, for about 15 more minutes.

Today, someone from the service place called to see how my service was. I considered, for a split second, lying, and saying that the service was fine. Because it was a woman who sounded nice, very earnest, and I felt guilty because my experience was so bad. But then, I knew that I just couldn't gloss over it. So I told her, though I left out the part about NEVER. GOING. BACK. EVER. AGAIN. She seemed incredibly apologetic, and asked if there was some small thing they could do for me to make it better, to which I said no. But then she offered me a card for some free gasoline, and I didn't say no. She said that she hoped I would call back, because she was trying to institute some changes, and things would get better. (To which I thought: Over my dead fucking body.)

And I know that this is lame, but I feel really guilty for accepting the gas card. Make no mistake about it, it was a baaaaad experience, and I left feeling angry and upset that I had spent so much money to get treated like shit. But I didn't tell the truth about that experience because I was trying to get something out of these people, and I don't want them to think that I did. In fact, I've had repeatedly BAD experiences at this place, but kept going back because of a) convenience and b) masochism, apparently. Even so, I don't want to be one of those bitchers. I'll raise a ruckus, but I never raise a ruckus expecting anything but what I was promised when I walked in the door. (And I do so love my new tires.) Also, I think that taking the card is sort of saying, "Okay, I'm pacified. Your badness is forgotten." Which it's not. I will not be going back to that place; I'll find another place to have service done, in the future.

So the question is, what is the right thing to do? Should I have turned that gas card down?