MTN

I'm on the MTN Sky packages, unlimited calls but since Thursday I'm unable to make any calls to any service provider. I've been to a MTN store in Festival Mall and they advise my to contact MTN. I've been calling MTN (135) and MTN direct and no body knows what happened to my minutes. After numerous calls I decided to write a review as I do not get any answer from MTN - the only thing is they log ticket numbers.