Upgrade gone wrong

I upgraded my contract on 10th of Jan 2016. A data bundle was supposed to be loaded and it wasn't I incurred out of bundle charges. In my wisdom I called the Call center, three case numbers later, I still have the charges loaded on my account. No one comes back to me, the last guy I spoke to in the store (Ziyaad) was more interested in his beard than dealing with my issue. I last went to the store a week ago, until now I'm still waiting. But Cell C is happily debiting my account. On Thursday it will be 2 months, 3 case numbers, 2 admissions of wrong doing. Still no resolution.