NMI DSM Durban - Poor after-sale service

I purchased a 2014 Hyundai H1 Bus from NMI DSM Durban on the 28/11/2015. I requested accessories added to the vehicle being a nudge bar,running boards,and navigation with rear view. I was forwarded prices by in which thye told me that the nudge bar was not the Hyundai product but a generic but that it was one and the same. He also forwarded me a price for the navigation etc. He however failed to tell me that the navigation wasn't a Hyundai product. I received delivery of the Bus only to find that the navigation radio was not compatible with the Hyundai H1 hence the stearing wheel controls did not work. I contacted NMI DSM Durban and Musa told me that he knew it was not compatible and that I should use the remote that was supp****. How must I use a remote while driving. The iPod cable which is supp**** with the vehicle was not given to me either. The reverse camera does not invert the picture so left is right on the screen. On phone function my contacts come up in Chinese I'm english. I complained about nudge bar installation and he admitted that modifications had been made. It has now come loose and hangs. Have sent 4 emails and not even one response from NMI DSM Durban. Very Poor