MTN - Exploitation!

Every day I have subscriptions that charge between R3 - R20 per day. I have never signed up for any of these subscriptions. When calling MTN they cannot help me, they cannot stop these subscriptions, however they come from.MTN themselves. I am told to check every day and cancel them, this is a tedious exercise, my question is WHY DO I HAVE TO SIT AND CANCEL THINGS THAT I HAVE NEVER SUBSCRIBED TO??? Customer service is a joke as they cannot tell me what to do, to stop these. They are of NO HELP. And no one gets back to you when requesting help.