POOR SERVICE FROM BAIC WESTRAND AND BAIC SA

I purchased a BAIC car from BAIC Westrand. I was informed that there was an accompanying 5 year service plan. This is specifically stated in the Offer To Purchase. When I contacted BAIC to book a service they informed me that there was only a 3 year service plan which expired in February 2023 and that there were no services left (surely the plan ends at the current year?). I contacted BAIC Westrand about 5 weeks ago and the dealer principal eventually confirmed that there was only a 3 year plan despite what it stated in the Offer (I also have it in writing from the sales lady that it is a 5 year plan). He then said he would contact Head Office and after a week or so later said that there is actually a 4 year plan on the car and that he would arrange a re-instatement of the service plan. That was about 3 weeks ago and I have still not received any confirmation whatsoever. I then contacted BAIC SA and was told that there is NO service plan on the car. He advised me to take it up with the dealer...duh.... thats with whom I have beed talking to for the last 5 weeks. So now I have 4 different opinions from BAIC regarding the service plan. How useless is this ? I am very dissapointed in the service that I have received both from the dealer and the Head Office - BAIC is trying to capture market share and if this is the way they deal with after sales queries, then I feel sorry for them. I sincerely doubt that I will buy another car from BAIC