Online order refund

I ordered cushions online from 2 different branches as neither had the quantity I wanted. The order was placed and paid successfully. A few days later, I received a call saying that the products were discontinued and they are not selling it anymore (why is it available to buy). The lady said she will try and see if any other branches over Gauteng still has some left. She managed to find the ones I had, but not enough, so I instructed them to cancel the entire order and refund my payment. A day or two later I got a call saying my delivery is on its way (only from one branch so this is half my original order). I again instructed it to be cancelled. I had two more calls days later asking if I want it cancelled. After that, I have sent countless emails, made many many calls and filled in refund forms to hear when I can expect my money. I don't hear anything anymore - no feedback. I have to follow up and have to beg for my money back. This has been going on for almost a month. I am so annoyed and frustrated.