Refuse to accept responsibility for damages caused by Volkswagen Nelspruit.

I booked my Volkswagen Tiguan in for an oil change service with Volkswagen Nelspruit on 30 October 2025. The vehicle had no prior issues when i booked vehicle in for the service. Three days after collecting the vehicle we discovered that the radio had a fault “ Media Starting”. I then made contact with Volkswagen Nelspruit and informed them of the fault, we booked the vehicle in to have fault checked. Volkswagen advised that the radio’s ECU is damaged and they cannot accept responsibility. I was given a quote +-R50 000. I then went to Volkswagen Nelspruit to discuss this with the technician and workshop manager that a diagnostics was done when vehicle was brought in and at this stage no stored faults was found prior to the service. The diagnostics report thus confirmed that my vehicle was 100% right before Volkswagen Nelspruit did the service. The manager confirmed that he would look into this and to date i have not received any feedback. I am very disappointed with the service received from Volkswagen South Africa. My car is fully paid but i still choose to service my vehicle at Volkswagen. I would appreciate if someone at Volkswagen can look into this and provide me with feedback.