Unfair billing due to staff incompetence

In November , my husband and I went into the MTN Northgate store. The current blackberry which I had received a few months earlier was not working properly and as it was switching off constantly it was not safe to continue using it. My husband had a Blackberry Z10 which he was not using. <br> We took the phone into the Northgate branch to do a sim swop and to enquire with the consultant if there would be any different charges if I swapped to use the Z10, specifically enquiring about whether I would still receive free internet on the new phone. The consultant advised us that there would be no change whatsoever and that we would still get the free internet on the Z10. We had the phone with us, so there was no mistaking which phone it was we would be using. He even helped us to put a new cover and screen on. <br> We have since been billed for internet service for our last 2 accounts amounting to over R3000. <br> I went into the MTN Northgate store on 28 December 2014 to report this. I have also reported this online 10/01/2015, despite numerous emails from Customer Care insisting the Regional Manager would be calling us we are still waiting. This service is extremely unfair and upsetting.