******* Debits on my MTN account

I have just received an SMS to say that I have been subscribed to MTN Gamer. I don't even know what this is? I don't play games on my phone, charging me R3-03a day. Can't get through to anyone to cancel this. This is absolute *****. I am extremely disappointed in MTN. Got through on the phone, only to tell me systems down, they can't help me.