harrasment over telkom's error and not mine

I have been incorrectly handed over. My line was cancelled in May and I was charged twice for the same thing. I have since been in to a telkom branch and been told what to pay and have been shown that my account is paid up and cancelled! I am being harassed by MBD and it's not correct!!! I do not owe any money. I have written communication from an agent at telkom saying my account is paid up and even with this MBD will not withdraw as Telkom handed over a different amount. It's insanene. Boitumelo refuses to acknowledge that there could be an error and to contact telkom despite me sending all this communication. This is harassment and I refuse to put up with it any longer.