I had a very similar problem, it was my Z's last voyage. I took it to an alignment shop, and said I want it aligned, i'll be back tommorrow.
Got a call and came there later that day, they said they put it on the lift and my frame and floors were to far gone, and they didn't even try and align it. They chargered me $30 to put the car on the lift, wich wasn't part of the deal. I said align it, didn't do it-and they charged me-I can't stand mechanics, I do all my own work now.
The mechanic b4 that was told to change my injectors, well, about 900 dollars later, they decided that my fuel injectors were bad, so they told me i needed them replaced and I just said "Really, you guys are smart, I told you that 900 dollars ago and you already figured it out, wow, you guys are smart"
Then I brought it in at a later time to fix my strut that i broke, when it was finnally done, i went to pick it up, I should have got it on friday, but didn't have time, so i had to wait till monday. Jackass mechanics left my car in the middle of the lot, and first thing monday morning, the car got backed into reccesing my quarter panel about 6-10 inches. And they refused to give me a rentel car because(EXACT WORDS)"It is not our fault that you have nothing to drive"-I sure as hell didn't wreck the car in there lot, so its sumhow my fault..............done.....
I won't deal with a mechanic again-ever.