XCEED PHEV 12/2020 at km 52,500 fell by the TÜV – brakes in the rear

Hello, today I had my car at the TÜV and thought that they wanted to fool me. After my 3 year old Stonic passed without problems 4 weeks ago it was called today – NO! The values of the brake were everywhere in order. But optically it did not like the examiner at all. Serious lack. No badge. KIA wants for the renewal with ATE 500 Euro. At Pitstop there is ATE for 265 with installation.