Bad Attitude - Billing system discrepancies

After exhausting all avenues with Altech Autopage account manager & credit controller, I posted the following on their online complaints facility, however I haven't received any correspondance: I have a split billing line that was move from Nashua to Autopage in November 2014. I have been billed incorrect amounts against my bank account since December 2014. I was also incorrectly billed out of bundle rate when I had a top up bundle facility that never activated but had been billed for. I have since reversed the incorrect debit orders since there were billing errors on your side - Autopage. I have raised these concerns with the credit controller of this account Patricia Ndou and account manager Marylin Palvie. Patricia Ndou is handling or should I say failing to handle this query. I asked her to escalate the matter if she's not comfortable to solve what should be a straight forward adjustment and send me itemized billing statement that I have been asking for since 26 February 2015. I am writing as my last resort inside Autopage. I will unfortunately be forced to take my query outside Autopage should I not get satisfactory assistance. I have a paper trail of all my comms with Patrici