Telkom IDS issues

I cannot believe the hassles that I am experiencing with Telkom - I opted to have the IDS on my 10 Meg ADSL line / data package to be implemented last year. It took Telkom 3 months to get the IDS SIMs sorted out before it was operational. Then at the end of last year I asked them to increase the amount of data from 100Gigs to 200Gigs. They deleted the SIMS that were then operational, and it then took a further 2 months for a new set of SIMs to become fully functional. I still do not have access to the 200Gigs of IDS data, but Telkom has been billing me (At R744 instead of the advertised R525 - nobody can give me an explanation for this, but I am still being billed at this fictitious amount) since last year. To make matters worse their attitude is 'if the billing system shows that you are getting the 200Gigs IDS then it must be so' -- I demonstrated that their customer portal still shows 100Gigs and that when I hit that cap I was kicked off the service!!.

I have lodged a number of disputes but many of them have been rejected WITH NO EXPLANATION. What do I do now? I have been in and out of Telkom shops since November - I am astounded at the lack of ownership and product understanding the company staff display, not to mention the inability to act or rectify glaringly obvious errors.