CMH Nissan Sandton Extremely bad service

I bought a BMW from CMH Nissan Sandton in November 2020. Upon receipt of the car I pointed out a few faults and was advised to wait until the car was due for service and report them to BMW. This should in fact have been attended to before delivery of the vehicle. That problem has been rectified after the car spent 3 weeks at the dealership.

What was not rectified a year and a half later: The vehicle was fitted with 3 different makes/series of tyres which resulted in very unstable road holding. The one tyre has a manufacturing date of 2013. I replaced the tyres and returned the old ones to yourselves and suggested that you compensate me by paying 50 percent of the value and you keep the used tyres. Also, after receipt of the car I was requested to put the car to through the test myself and that I would be reimbursed with the money paid. After submitting the document and receipt various times, I have still not been reimbursed. Please bear in mind this is since 2020 already.

Numerous telephone calls and requests were escalated to the dealer principle, but to date no reply or reaction was received.