BAD SERVICE

By mistake I paid dstv R6000,00 instaed of R800,00 whilst I was busy with something else, when I realized this, I immediately called them and documents needed for this and they said they received the documents, a week later I do an follow up, they say no documents were submitted. Like really? and declined to give me my money back....This is my money that we are talking about. They keep saying the refund is captured, a week later its not. I have to keep waiting 7-14 working days. This refund is R5,200 that we talking about. I refuse to wait another 7 days, I want my money and cancelling this pathetic service provider.