About 6 weeks ago a tree branch fell on my car and beat up my hatch and rear end. Now, insurance covered all the repairs for it and I got it back yesterday. Now the controls for the sunroof don't work properly. The body shop claims they didn't work on the sunroof at all and the controls must have been damaged by the tree limb. The insurance company wants me to take the car to another shop and get them to put it in writing that it was caused by the tree limb. Every place I have called around here says that they can't do that. Is there anything I can do to get this fixed? It all worked right before a tree fell on it.