Credit listing disaster

In 2013, MTN listed me on the credit beraux, and now that i called them, they say that the phone number belonged to Foschini. I phoned Foschini, and they said my ID number does not even come up on the system. I have never had anything to do with Foschini in my life before. The lady i spoke to at MTN was utterly rude, and now i dont know who i can contact to remove this listing from ITC. But also on the report, it says that in 2014 my account was paid up. I need to buy a house, and now because of this, my life has been turned upside down.