What should I do?

[I FluXx I]

due to a small amount of damage to my car I had to make a claim with my insurance. The front and back bumper bar plus a drivers door had to be replaced. I thought that seeing as the bumpers had to be replaced, I mite aswell get fiberglass BA GT bumpers. The panel beater was fine with this. He told me it was going to cost a little bit more because part of the kit had to be painted silver, and a little bit extra because there was a 7cm crack in the back bumper. This was all fine.

The car is almost ready after a month(finaly!) and he has finaly given me a price for the extra work. He said it was going to cost me $335 for the two tiny parts of the bumper painted silver and for the crack that had to be fixed. I need to know if this price is a little steep? he isnt fiting the bars because he said they dont fit perfectly, but he is still geting paid to fit normal bars. The insurance company has also paid to have a new door put on, but he has just bogged it up. Isnt that fraud?

Im thinking of telling him that im not going to pay that much seeing as he is just doing a dodgy on the door and not fiting the bars