Mahindra Umhlanga - worst after sales experience ever

I bought a Mahindra Scorpio N, actualy 2, from Mahindra Umhlanga, I was dealing with the owner Regan McCann, last year August. With the second one I reported issues to him within 24hrs of taking delivery and numerous more thereafter. I started making a big fuss in January '24 during which I managed to get a response from him. Since then my wife's brand new car has been in and out for repairs at Mahindra Edenvale, which was arranged by Umhlanga. Mahindra Umhlanga, Regan, has just been ignoring me since then and not taking my calls or calling me back. I have been requesting a courtesy car and from January when the "repairs" started I managed to get a car once and both Mahindra dealers are ignoring my request.