Hellish frustration

Previously able login to Telkom to pay account. Now, whatever permutations tried, even reregistering, it rejects all efforts. I CANNOT LOG IN TO PAY ACCOUNT! Now I have received a demand for outstanding amount! Furthermore, cancelled ADSL line 02-2018. All efforts to have this executed proving fruitless, but I have been forced to pay all amounts "owing"! Based on a year plus of paying for a CANCELLED line, I am in credit. Telkom accounts would not be able to dig a sandpit in the desert they are so UTTERLY USELESS!