Horror with Dstv(multi choice)

I have been calling the Dstv call agent from December 2022 till to date, trying to cancel the subscription that I did subscribe to. every time when I call, I always find a useless and clueless agent, they always promise to get their supervisor to call me but they never do. I'm still fighting this battle till today with no help iam even considerating cancelling this Dstv thing