Just forget about it. It happens. At least you got the car fixed right. I work on my own car and there have been times when I've had to take it to get it fixed because of time, etc. Afterwards, I've looked at the bill and thought about what I could have used that money for...
You need to ask around and find someone who can do this work for less when you are in a crunch. Even if you work on the car yourself, you need a backup.