Extremely unhappy customer

VERY UNHAPPY CUSTOMER: I bought my brand new Mazda3 in March this year. The front display developed a line across it about three months later, which I was assured would be fixed with a new instrument cluster. I waited 2 months for the delivery of this cluster, being assured by Mazda Fourways that the cluster would arrive on 4 Sept. After a follow up this morning, I was sent an SMS to say that the ETA has now changed to 19-NOVEMBER!!! No phonecall. No apology. And I can't get hold of the branch - their receptionist keeps taking messages and telling me that Lukas, the workshop manager, will return my call, which he doesn't. THIS IS UNACCEPTABLE!! I bought a brand new car and I want it to be in perfect working condition. In addition, my front display now says that the vehicle is due for a SERVICE!!! It's only got 1700km on the clock! I am extremely unhappy.