Shocking service from Telkom

I have received the most shocking service from Telkom. They have suspended my account due to a billing error on their side and even though they have admitted that I have been overcharged, they inform me that this may take up to 7 working days to sort this out. Firstly, they didn't give me any warning about suspending my account (for a ridiculous amount of R170 that they overcharged me) and secondly I am paying for a service that is not available and on top of this I am paying a fortune in data costs whilst I don't have WIFI. This is the most backward company I have ever dealt with, the managers are protected by the call centre staff and refuse to take calls and it is almost impossible to get through on their "customer service" lines. To make a client wait 7 working days for an error made from their side is completely ludicrous! I expect to be refunded for this month considering that I have not had any WIFI for weeks now and the fact that I am paying large amounts for data whilst I am offline.