Pathetic Service and Wrong Billing

Telkom keeps sending me double bills every month, one for my old home from years ago with my current details and another with my old details. Confusing right? one says I don't owe anything and the other says I owe too much. And now I am getting messages that my account will be cut off unless I pay up. Telkom please do not cut my line first help me understand which amount you want me to pay! And you need to update my details to reflect only the new home line where you moved me to not the old one aswell!