Had this happen to me very little damage and the guy tried to screw me, I took it to court and said there was very little damage and I had nothing to do with getting it fixed and that it was left 2 months with no contact till the bill turned up
it was just chucked out on the grounds that I should have been advised and had a chance to have it seen by a number of repairer of my choosing and the fact that the insurance had not taken any photo to back up the story of the damage
I also said he changed lanes right in front of me to get a lane with less cars in it from a lane with a large number of cars in it with no indicator and no room for me to pull up
:0 sometimes you just got to bend the truth a little
Oh the bill I got was 9K
I took photos of my damage as there was very little it all helps
Good luck with it