Billed for 2 ADSL lines, Not solved 3 moths later

When getting my ADSL line the lady made a mistake and had to re-enter all my information. After assuring me that this wont affect me and receiving 2 SMS's, passwords, email addresses and installation dates and still being assured that there is nothing wrong I was happy, until the bill came! I am being charged for a line I dont use and that doesn't exist. and after 3 months it still hasn't been solved! <br> <br> The call centers and people are all useless and they arnd helping anything at all. Now I am stuck with a bill of almost R2000!