Costant incorrect billing

I have been over charged on my cell contract account, I logged a case and they are doing nothing about it. And this is not the first time. There is a lot of complaints against Telkom mobile that they do not attend to, check their Facebook wall for evidence. I am happy with their deals and signal but I cannot tolerate them over charging me. Their call centre staff is also ***********, you ask them to do one thing and they do the other, as a result that affects their walk in centre staff that knows how to do their job.<br>