VW Poor Service and Bad Customer Treatment

I purchased a Service Plan Online with VW and after purchasing the plan. I received a contract confirming the start and end date. I also received an invoice as proof of payment. I also have a proof of payment from my bank. When I called them, they said that the plan is not active and are unable to see the payment. However, they sent me an invoice and confirmation email that it’s been approved. I waited for over 2 hours at the dealer while they were giving me run arounds and not attending to my issue. The dealer was not able to release the car due to that.