Dstv / Multichoice unhappy client

Multichoice upgraded me to the higher plan without informing me. The plan includes Showmax for free. I am unable to watch showmax it gives me hiccups even if I try to downgrade it gives me problems. I don't that plan they put me in. I want to go back to my original plan please the one I can afford to pay monthly. You the one that upgraded me now I'm struggling to downgrade