Volkswagen Soweto

This is the 2nd issue we having with Volkswagen Soweto, on 24th October we took the car for service and paid cash whereas we were advice that the card machine is not working so the following day we picked up the car us not idling perfect so we report the issue and was advice to bring the car back to vw Soweto and to be advise that they will check and confirm that they check the injector and will clean and fix the issues to our surprise the Sunday the car idling worse and 02/11/2020 we report the issues again and they advise is to pay 1800 and they will fix the problem and we never fiddle with the car and we also pick up the latest service history shows that car was service on 3/11/2020 And service was done on 24/10/20 And we didn't even get an invoice that payment was done the lady wanted to get rid of us very quickly . When we request job card it's all blurry for a service that was done in October showing service was done on 03/10/2020 And also our receipt was made om 03/11/2020 at 12.26 where we were ay work...Lastly the latest service history shows that credit ref means money was paid back to client.. we never get money back from Volkswagen Soweto.

Did anyone also have similar issues with them, because they insists we must pay and the issues comes from their mechanics side.