Incorrect billing - 4 consecutive months

I recently upgraded my contract with Autopage (after being moved to Autopage from Nashua). For the past 4 months on my itemised billing there were 2 types of incorrect bills. One relates to a line item with no description, duration or number but a random value (ranging from R80 - R120). The second relates to the SAME roaming charge (same date/description/value) on every invoice I have received. I have not been out the country the entire year. The call centre is extremely pathetic - normally they cant assist. On one occasion I was transferred 3 times before the call was dropped. So for the past 4 months there are about R200 worth of **** charges on my account. After complaining on hellopeter a few months back the first invoice was corrected but the below average call centre was unable to assist. I can clearly see that these **** transactions will be processed on my account in the coming months unless someone in management wakes up and fixes their apparent IT glitches.