VW HATFIELD POOR SERVICE DELIVERY

i bought a Tyquan 2020 model on the 1st of September 2020, i gave me problems from the word go with the mirror paints, the black strip around my car, the boat and the camera. Lat week they fixed the camera nd i was happy with that. Now when i tell them that my strip its coming out they are saying its due to me bumping or in an accident. So i used a sellotape to put on the falling off of the strip around the car and its untidy and makes the car off-bad quality. Can you please assist