Mobile phone line and data line were swapped

I was phoned by a sales person from MTN on 29 July, arranging for my due upgrade to be done telephonically, and new paperwork to be delivered at my place of work, at a lower rate.<br> This was done, but when starting to use my phone and data (3G) lines, I discovered that the two lines that I have been using for may years, were swapped, so my data line is now my phone and visa versa. The phone functionalities must be connected to *** and the internet connectivity must be connected to ***. This is causing a lot of stress and must be corrected immediately.<br> I am stuck. Cannot phone. Cannot use my data.<br> Went to Century city service centre. Was assisted by Shihaam Jakoet. Says her hands are tied. Cannot assist at all, since the upgrade was not done by them. <br> I need some sort of response and resolution to this. PLEASE HELP!