Audi Q5 Nightmare

Very long story short. It has been 5 months since my Audi Q5 40 TDI 2019 model with 18000km first gave trouble with its gearbox. After the third attempt at Audi in George trying to fix the car, it is still not fixed. Now I'm trying to get a hold of the right person who can assist me with a claim for a new car. However for the past two and a half weeks I have not been able to get a hold of the right person or division to help me in this regard. Audi Assist is refusing to help because they say the correct steps to take would be to submit a claim at Audi in Vereeniging where we bought the car. Audi Vereeniging is refusing to assist with the claim because they say it is a manufacturing fault which should be escalated to Audi South Africa. I've talked to all the above mentioned parties at least 3 times but each time I referred back to one of the other parties. I'm shocked that a car that cost me nearly R800,000 and was less than 12 months old the first time it gave problems with less than 18000km could be that unreliable and the service that comes with it.