Box Office Account

I paid my Box Office account on 27 Aug 2015. Since then the amount is still reflecting on my account and it has not been credited. Each time I phone I have to send proof of payment. I have called numerous times and the problem is not sorted out. Some of the employees tell me the reference is wrong but that is the number on my DSTV app. I am really livid, how can it take so long to sort this out. Really bad customer service.