Avoid Hyundai Stellenbosch

I've been servicing my car with Hyundai Stellenbosch since 2018/2019 - from the start I had an issue with my car's GPS (with video evidence of issue, so they know exactly what I am talking about) and have taken it back to them roughly 10 x times for the same issue. This past Tuesday I took it back again for the same issue, and two other issues and they literally did the same thing = resetting and/or updating it. The day after, same issue again and not satisfied. Been a patient customer, went to dealer principal and said I must pay for replacing a GPS card, not under motorplan and/or warranty for some reason. Given that the car had the issue from the start and thus faulty from the start, I disagreed and now they are just ignoring me. Been calling and going to their premises each day, leave message to please contact me with update on how this is going to be resolved and as of this morning the dealer principle has done none of it. Thus in short, I'd recommend anyone looking to buy from Hyundai Stellenbosch rather buy from another dealership where customer service will be valued, you'll just struggle with these guys after you purchased your vehicle - thus forcing a good client to no other option than leaving a complaint, which was last thing I wanted to do.