No feedback on incorrect bills

We have gone over from one bank acc to another. The details was changed via the bank with Telkom. Then I had to pay money over 2 months in a row for Telkom account. They sent me a message that I didn't pay and I phoned them and it was rectified. Then the debit orders went off 2 more times. Now end September I receive a message that I owe Telkom 592 for outstanding acounts. On the 6th of October again a new account that I now owe more than 700. A message and various emails was sent, without any feedback or response. I want urgent feedback on this bill, it is not acceptable that I get messages and phone messages stating that I did not pay and need to make payment whereas I am waiting and nobody sorts out this bill.