Refuse to service the car within the 3 years

I bought my Haval in May 2021 with a 3 year service plan. Bought it from Haval Hatfield. For the first 2 years I had no problem servicing the car in March. In March 2024, they send me a sms to bring my car in for service which I did. Two hour later they called me saying the service plan had expired. They say the service plan is 45 000km or 3 years. I told them the car is on 40 000km and I do not have the car for 2 years. They say because the dealership (Haval) had the car since January 2021, the service plan started then hence the expiry of the 3 years. They did not even know the service plan expired otherwise they would not have send me the sms.