Bad aftersale service

Goodday, we bought a used Haval H2 in January 2022 with a extended service plan. On 2023/06/19 I booked the car for a service at Haval Cape Gate for a service, just to find out that the extended service was never transferred to the new owner of the car, due to this non compliance I could not service the car, the transfer must first be finalized. I had to reschedule the booking and got a date for 27 June 2023, I took the car and was told by a employee of Thorp Plumstead that all documentation was in order, just to find out its not. Today 2023/06/29 my car is not yet finished. I told them I was supposed to go on holiday for June school holidays but it seem its not possible. II's so inconvenient for us as a family and i starting regret buying this car from them. I have to attend a international event in Durban and doubt if I will be able to. They never even thought of servicing my car at their own establishment while they get the documentation in order, there is also cost involve in this whole mess, it's time that someone take responsibility for all this, soon we will escalate this issue if not finalized in our favour.