telkom unfair billing

I would like to lay a formal complaint against telkom as to unfair billing practises i had a faulty line and I had no way of using my wifi for exactly two weeks I recieved my bill and I saw that I was charged for a whole month this is not the first time that I have this query with telkom but it has been coming on since January so can anyone out there please tell me or give me information as to where I can lay a formal complaint or if anyone now the district prosecutors email because i am tired of this problem with my bill. And another thing is that I get a message saying that if I don't pay i my line will be suspended really now telkom you at fault and you want to switch people off i bet you if I start going around in my neighborhood i bet I will find more people that you are ***********