Volkspower Service & Spares Ltd

?I left my car with Volkspower early morning (last year) to find out what errorcode was generated on my beetle, received my car back in the afternoon, they found nothing as the error got cleared when I unpluged the battery to get it going. Next morning, I saw some new scractch on my beetle so I emailed them to find out what can be done about it (if they want to do insurance claim or should I claim it with my insurance). Next minute, I get an abusive call with very foul language from the service manager (Marty Douglas) accuse me of being a liar. I have never been insulted so much in my life, I hung up when he have said enough. Then he email me to basically say sue him if I have evidence that the scratch was done by him... I though that was it, but then I keep getting invoices from them. I refused to pay the $140 they wanted for their rude service. It's now nearly a year and still they sent invoices. I had enough so I phone MTA to complain. Spoke to Julia who advises me that Volkspower is not MTA registered so they cant help me, but advises me to pay so I am going to pay but I will leave my review everywhere so people know that they gave me abusive customer service, they are not MTA registered, and they are not Volkswagen's agent. ?

Complete cowboys! BEWARE!