**********ly being billed extra every month

Every month since i upgraded i am being billed an additional R14.99 (incl) for a 100mb data bundle which was was free on the upgrade package i chose. Upon my query on Feb 2015 invoice i was advised by the consultant at 808 this will be investigated and reversed of which i have only 1 credit passed in my March bill and how dumb to charge me the same R14.99 on my March invoice. This is theft and *****. I need answers why is MTN *****ing from me. I need to go to the media to make the public aware that they could be victims of this theft as well.