HORRIBLE SERVICE

I have called the call center three times since January about Itemised billing being added to my account without my consent. The upgrade document from my upgrade in December shows that I have not requested itemised billing and now I am being billed different from what my agreement states. So then why does MTN not rectify the problem? Every time I call the call center, the system is either down, or they can't take Itemised billing off they have to send an email, yet the reference number gets closed within 5 minutes.