Few days ago went through massive pothole, scratched alloys left side back and front with gash on front tyre. Took it to m8ni dealer to be looked at, wouldn’t let me come in servicing bay which was like a mile a way, had stranger driving my car. After 30 mins car comes back the plastic seal on wheel arch is scuffed and bit of bottom bumper. Said to the guy you hit my car, his exact words were there a massive door at front with automatic closing door and service bays have loads of room around. There checking there cctv at the moment but I am gobsmaked taking my car for damage to get more of it, especially synther massive bmw dealer in the uk.......... anyone, mechanics tell me how this damage could of occurred and how to take this further