Oh ic. Well as unfortunate as this is, this has happened to me as well, when I went to get the horn fixed for my other car, the body shop said they can do it for 250, then when I got there to pick it up the guy wanted 450. I asked him why the price change, and he was like I had to go back in the steering column bla bla bla this that, I was like dude you are giving me my car and im getting the fck outta here, or Im gonna call the cops, your choice, and he was like oh no need to involve the 5-0 we can work something out.
2 minutes later his assistant ran out with a recepit that said 250.00.
So lesson learned, always make sure you get quotes WRITTEN, especially at small time shops where there is no set price, and the manager or owner can decide to change it at his wish.