Accident with rental motorcycle

Hello! My girlfriend had borrowed a 125 Yamaha machine over the weekend. From the dealer, with 500km on the tacho, so quasi new. On a gravel path she slipped at SCHRITTTEMPO and fell to the left side. Visible damage was a bent footrest and a scratch on the front fender. Now she was at the dealer, he looked through the machine and comes to a damage of 1200€!!! That’s not normal, right? He said the fork is bent, the fork is bent, the fork is bent, the fork is bent. You have to re-install the plate (because of a scratch!!) and a bunch of parts with traces of wear, because it is a NEW VEHICLE. Remember, with 500km on the speedo. He has also already earned money with the rental. My girlfriend has already paid the bill, but I mean that’s pure rip-off!! What do you mean? Can you still deal with it? Order a neutral reviewer? Or even a lawyer? Thanks for the answers! Greetings,