POOR SERVICE! UPGRADE GONE WRONG

I'm sick of Telkom and their poor customer service. I upgraded my data 3 months ago (40G Day and 40G Night), but I'm still not receiving my data. But they are surely debiting on my account every month. When I went to the store for assistance, the person who checked for me said it was active. Went back home, only to find that it's still not working. Went back to the store to enquire and I was told they can only log a call for me, since I did the upgrade online. A day after a lady called, during the call she got cut for some reason, and never bothered to call me back and follow up. The worst is that I'm paying for this and I'm not getting what I should be getting. I'm frustrated as hell!