Subscribed to MTN services - NOT an MTN client - cancel subscriptions IMMEDIATELY

I have been receiving SMS's that I subscribed to Goal TV and PockitTV Premium at R3 and R2 per day. I did not in any way shape or form subscribe to these services. I contacted Afrihost for assistance and they have no interest in assisting me. I was told that it is not an Afrihost problem and that I should call MTN. Can someone from MTN please contact me ASAP to resolve this issue? And cancel these services IMMEDIATELY!