disgusting service

I am quiet disgusted by the level of service i got from you regarding an MTN Home WiFi package I took out telephonically. The premium that was debited from my account today is not what was agreed upon during the call. Since discovering the incorrect debit, I have contacted MTN several times for assistance. Each time I am told to call the Billing Department. When I contact Billing, they advise that they cannot assist me and redirect me elsewhere. I am being sent in circles with no resolution, despite this being an issue caused by MTN’s incorrect billing.