Porsche joburg bad after service

Purchased brand new Cayenne on 2019, after the annual service then the camera system is giving problems, ever since from that time up till today, I have keep on sending in the vehicle to fix up the camera issue, Porsche Joburg said they already replaced the complete camera system and even the data cables but still giving problems, now is the 6th time they asked me to send the vehicle in again, the only thing they said is "please bring the vehicle in and we will see what's the problem", my car has been in and out for the past 6 months...... no solution at all, for paying that amount of money and try to get a quality vehicle but unfortunately the after sales service is only "sorry and sorry", who will pay for my installment?