GWM Centurion

So we serviced our Haval H2 at a reputable dealership in Joburg and a couple of days later the car broke down, the spark plugs cracked which we purchased from Haval! We took it to GWM / Haval Centurion and got the shock of our lives when they informed us that the warranty ran out 15 days ago and we were told that Haval would not do good on our expired warranty, they have had our car for 3 days and my wife has had to Uber to get to work from JHB to Pretoria, I then told the service department to please change the spark plug and we will take it somewhere ells if there is still an issue with the car. This is outrageous and disappointing, to say the least over and above the pricing that has been inflated significantly more than the normal price and that they quoted on other parts that are not even remotely part of the problem in the final quote.