Brought in the vehicle complaining about poor gas ...

Brought in the vehicle complaining about poor gas mileage, dragging feeling. They charged $90 , said no codes, said they road tested, nothing found. Funny, on the paperwork, mileage In was same as mileage out. Less than a month later, warning lights, no overdrive, etc. So I bring it back. They don't call, I call only to find out they need a part to order and it stays another day. No calls on the third day, I call, where's the car? Uhm, oh.. Well it is not done. Next day...7 am they call,.. It's done.
I think it was done the night before. Saturday pick up, zoo. Never again.