Account outstanding 2000

Ok here goes 2 months ago we app**** for the telkom internet deal, to our shock the told us there is an outstanding balance from the year 2000 (15 years later) still on the system. Ok we went to telkom direct in Menlyn and the consultant said he will contact the accounts department and have it removed 2 weeks later NO RESPONSE. Drove all the way there again spoke to another consultant same story sent email to accounts department 11 days later NO response phoned billing TWICE answer still working on the problem, asking when it will be resolved cannot give me an answer, SO I guess you have enough clients and do not need any more seeing that there is no SERVICE from your side. Absolutely *******!!!!!