Billing Error for 6 Month, Telkom not attending to

On the 11/03/2015 at 15h03 I called Telkom(10210) from *** number to upgrade my line speed and downgrade the data. A consultant by the name of Thobeka Luthuli upgared my line (order number ***A) and she advised me that my total monthly bill will be R469,00 excluding the outgoing call that i will make. It was to my surprise when i received my bill month end and it was over R2000. I managed to dispute it with telkom and the following month bill was R198, which was also low because there was a service interruption. As i thought maybe the problem was resolved, It all started again and from that time I've been over billed every month. I called again and spoke to Anemarie Swanepoel (***) who confirmed that I'm supposed to be billed only R469,00 and she can see on the system that it is a special package for me and she promised that month end it would be resolved. unfortunately i still got over billed month end and I called again where a conference call was initiated between Sales and Billing department as well as myself (Date: 15/07/2015, Time: 10:30, Consulatant: Thembi Qabashe). They have promised me that the billing error would be resolved, but still not resol