No way to cancel subscription

There is no option on either of the dstv apps to cancel my subscription. I am paying R800 per month and I can't afford it anymore. When I try to go on WhatsApp, the feedback is that they can't find my profile. When I go on the live chat it says that I am contacting outside business hours. Which is not the case. They make it impossible to cancel anything or update your subscription. This is my second time that I have had a subscription and I have NEVER had a good experience. The multichoice marketers phone me several times a week to sell me products, even though I have a current subscription. If I am not assisted during this week to cancel my subscription, I will take legal action.