No duty and care afforded to me as a client of KIA

I'm deeply disappointed with KIA's service. Upon purchasing my KIA Seltos, I received the wrong service book for a diesel engine, leading to incorrect service intervals being indicated from day one. When I requested the correct service book, they couldn't provide it. Over and above this, when I serviced my vehicle, the service clock wasn't reset, so that I would be provided with the correct notification when my next service was due. When I went back to ask them to correct this, they refused to do so. Despite having a Maintenance Plan, KIA refused to service my vehicle for the 60,000 km interval, claiming I missed the deadline. Their initial response was to redirect me to Liquid Capital, despite my vehicle purchase being from them. When I raised concerns, KIA imp**** that signing an invoice absolved them of responsibility in terms of the incorrect book being provided and the service clock not been reset. It was said I should’ve known that the intervals as per the book and incorrectly set service clock, were wrong. They also failed to provide the agreement I allegedly signed with Liquid Capital after numerous requests by me, citing POPI as a convenient excuse. Their refusal to service my vehicle now puts my warranty at risk, yet they show no willingness to accept responsibility or provide a satisfactory resolution, despite my multiple attempts to address the issue through their customer care division. I am now forced to approach the Ombudsman just to enforce my rights as a client of KIA, who as a client had a reasonable expectation that they would exercise duty and care towards me.