Damage management

Hello guys, I got a little problem in November 2007 and what had to happen to me was driving on the first day of a back, everything nice and good I had to pay off the damage then according to the expert report, also repaired the damage with a buddy in his free workshop. But now I got another one on it and also on the almost same spot, was again with the expert and everything the expert also did not have any pre-damage that since I pointed out that someone has already driven against it there. Only now the insurance spins and wants from me a repair confirmation, the problem is that I have none and that my buddy can not write to me either because we have made everything private. Can I do anything here or I now sit on my damage.