Failure to rectify over billing

In December 2015 i had experienced bill shock after telkom billed me more than what I was meant to be charged which I then contacted the call centre to enquire as to why my invoice was so high ,the agent assisting then logged a fault with reference number ***2 which I never received any feedback on and resulted in me having to call the call centre to follow up and only to find the fault was closed as the accounts department claimed to have attempted to contact me which never transpired so the agent assisting logged another fault which also went on deaf ears. The account was billed with an additional amount of R686.37 for a data charge for data that was previously free when the contract was still running and again in January 2016 received an invoice of an even higher amount which the additional charge which brought my invoice up to R1111.00(where my regular invoice is R579 + 2 spend limits of R150 making R300) as the contract was now on month to month , i ended up calling in again to which a reference of ***4 was logged and this time i received a call from the accounts department after threatening to take the matter to hello Peter where the agent said he saw what the proble