Being insulted by dstv agent because I was not interested on insurance

I was called today as dstv client my customer number is ***6 on 04.11.2021@11:06am I was Called by the lady called Nonhle Hlongwa regarding the insurance cover and after she explained everything I told her I'm not interested. Then she told me do I even know what is it that insurance do since I don't even understand english and I told I can afford to buy new decoder without insurance then she told me this is why she hates venda tribe so much as they think they are better people whereas they are not. We end up exchanging words as I was not also upset. So do I have to be forced to take insurance because I will be scared of being insulted. I don't owe dstv anything so why must I be treated like nothing. I need response or I will have to take the matter to ombudsman