NetStar Cancellations Department is a disgrace!

The worst customer service EVER! I requested to cancel my account with an agent of the NetStar cancellations department and he sent me a cancellation figure that I then paid via EFT. A week or so later I was debited a cancellation amount even though I had already paid. I contacted the agent I had dealt with previously and he instructed me to reverse the debit order since I had already paid. I did so. A month or so past, I moved out of the country, and then I received a debt collection (Hybrid Collections) email saying I still owed R117! I responded by attaching the email correspondence with the cancellation agent as well as the proof of payment. Well, FIVE emails later they are still hounding me! Each time I attach proof but they IGNORE it! The recent one I have now emailed the NetStar cancellation agent himself and cc'd the debt collection people. It is absolutely ridiculous - I have never had such poor service in my life! The worst part of all this is that NetStar does not seem to have a customer complaint line (probably because they know they'll be inundated with complaints), so I can't report this further up the NetStar line. I have seen countless similar complaints from other (now ex) NetStar customers. NETSTAR GET YOUR ACT TOGETHER!!