Vw the Glen Service

The most terrible service I have experienced with Vw the Glen to date. I have a Polo 6 1.2 TSI 2015 model and my service plan expired with the dealer last year. I went to the dealer on the 23rd of March 2019 for a quote on a service. I provided all necessary information to the service consultant so she could quote me on the appropriate service. Once she had entered everything in the system she told me it would cost R1800 for the service. I booked it in for service on the spot and did not question the price or request a typed out quote. On the 30th of March 2019 was the day of the service and when I went to sign the car in the consultant told me it would now cost R3800 for the service. I then questioned the price and was told it’s because this would be a major service. I signed everything off not happy about the change in price but my car needed the service. When I went to collect my car after the service I was charged R4604 for the service I was outraged and questioned this. I was told that this is what was done on the car and that this is the price. I could not even get a copy of my bill form them as they systems have been down since the 29th of March 2019. I have been a customer of Vw the Glen for 4 years now and after this experience I will never support them again. This was blatant theft from their side