Lateral underbody protection

Hello everyone, I drive a Kia Proceed Bj 2020. Last Sunday we came back from HH and met on snow on the way home. Fortunately we also did not get up the mountain to our house. We reached the parking lot only after rooms of the road. The next day we went shopping and noticed a grinding noise during the drive to the supermarket. I looked and had to find out that both side underrun protections have loosened. to my Kia dealer. He took the car on stage and removed the remains of both underrun protections. It was clear here that there was ice here above the Unterfahrs. Then I got a KV over 624 euros. I asked if it was not covered by Kulanz. This was denied. I contacted Kia Germany. Here too it was pointed out that it does not fall under manufacturer warranty or similar. In my opinion, it can not be that Kia Germany is not covered. above the underrun protection can accumulate foreign bodies (in this case snow) and hold up the hand afterwards Kia. Then I should theoretically not move my car any more in the snow. Or I have to make an appointment in the workshop right away… Now I have signed up here to ask for your opinion or for similar experiences. Would I be very pleased about the answers to this… Thank you in advance