Call center agent bad lack of customer service

I called subscriber collections and spoke to an agent who does not understand customer service at all. I wanted my refund of R595 that has been pending since the 28 Sept 2015 when Nthabiseng Mokhanedi failed to assist me with this request, I then demanded to speak to her supervisor who too failed to come and take my call her name is Pravishee Kella, I was advised she was on another call, I requested her manager and Nthabiseng said she does not know who the manager is. Nthabiseng decided to cut my call even I after I told her that I will wait for her supervisor to finish talking on another call, this was an extreme way of showing her rudeness towards customers, its shocking to think that I have just done an upgrade with Vodacom on my *** number and I am now considering cancelling it due to this bad service I have just experienced with your staff. I transferred R595 on the 24th Sept after the debit order did not run as expected on the 20th Sept however for some unknown reason to me the debit order went off on the 25th Sept for R585.73 - I then asked for a refund which Vodacom is failing to process because of people like Nthabiseng and her supervisor. Refund my D/O acc pls.