Bad Service

I purchased my Haval H6 1.5 City in 2019, the car was due for its last service this year. i received an sms from Haval Hatfield on 05/05/2022 informing me that my car is due for service, i contacted the service centre and we agreed that i will bring my car in on 09/05/2022 which i did, a few hours later, a consultant from the service center phoned me and told me that my service plan had expired, apparently on the same day that i took it in. i was advised to contact the Haval Customer care department , i was assisted by a lady called Naledi who logged a complaint on my behalf, the following day she sent me an email informing that they cannot authorize the service as it expired on 09/05/2022, the same day i took the car in for service, i then escalated the matter to her manager, Natalie Mostert, who assured me that she would look into this matter, i followed up after a few days and she told me that she was busy working on it, then i followed up again after several days and she was out of office and i left a message, no one got back to me, i phoned after two weeks and she told me that they cannot authorize the service, my argument in this case is that i took the car in for service the very same day that the service plan was due to expire, surely the last service for 45000km should have been authorized, i was /am on the market for a vehicle upgrade this year and i was considering the Haval Jolion as my car of choice, not anymore after the terrible service i received form the customer care center and the service center, for a company that recently found its feet in South Africa, i think you can do better and i am still requesting that you authorize the last service for my vehicle. my contact number is ***