Very bad customer service. No one to help.

I have a few problems with my account with DSTV. I don't pay but they put a debit order though monthly. I tried to query that I cant draw a September statement. The lady (I have her name) says their is no September statement but yet there is a balance cl/forward of an amount end of August and a different amount b/forward in October. They overcharged me for November. The problem is that the lady cant help me because she cant understand that there should be a September statement as there was movement. So I tried to speak to someone else. I wait about 10 minutes plus to speak to someone in the accounts department. Apparently the accounts department not allowed to speak to me. I have to work through the agent but the agent don't understand. Eventually I asked the second lady ( i have her name) if someone can just contact me so that we can sort the account out. She promised she would ask someone. Until now nobody contacted me. Further on how can I have ab outstanding amount on 60 days if they put an debit order through monthly.? That is impossible.