Pre paid subscriber yet billed Post paid

Today I discovered that my dstv was suspended. I called customer service and was initially told that I my account was in arrears. And needed to pay R 281. I couldn't understand because I had made a R400 payment on the 23/10/2015. I am a dstv pre paid compact subscriber. My services were terminated on the 28/10/2015. When I called again I was told that I now had to pay R 240. I explained to the consultant, the principles of prepaid. You cannot tell me that I owe u money when I must first pay to get a month long service and have u tell me four days later that my account is in arrears. In any event I was seriously taken aback. I want my money as I tried more then 3 times to get an understanding of how the line wss suspended and there was not even that annoying envelope you guys brandishly display from tike to time when u remind us to make a payment. Nonsense...really annoyed