Suitcase side claddings broken off by wash road

Hello, together I’ve been new to the Cupar family for 1 year and I’m actually pretty happy with the car until now. However, it’s kind of weird to me in the last month. I drove quite normally to the wash road (Shell), where I always wash the car. Couple of hours later I noticed that one of the side paneling at the back of the trunk has broken off (the gloss varnish plastic part). Of course I immediately called Shell and reported the damage and the have All well, but a few days later comes a letter that it is not fault of Waschstraße I am supposed to give up***. Ok, a few days later to the same wash road is also broken off the right panel – this time I photographed everything and immediately reported to the gas station. The branch manager immediately told me that he can do nothing because I moved the car ( ??? ). And after video observation is supposed to be an alleged production failure r be of my car, instead of guilt of wash road. Lawyer called, everything requested with pictures and everything. He told me that I have no right and I will not win anything in the case and I should pay with my comprehensive everything (What?) to the Cupar, told everything – the guy there just laughed and said “Ne, that never happens at Cupra/Seat, first time I hear something like that, we can’t do anything – fully registered” So, first of all apologies for Rechenfeh learn and for the whole novel here what I have written, but I am really mega Sauer and I absolutely don’t know what to do in such a situation. In 2 words everyone shows with “the” and I should pay myself everything that I find really particularly bad… I would be happy if someone here has an idea for me, or really a legal answer. Thank you!