Unpaid Refunds

I purchased goods online and I was called by someone from the Fourways branch to advise that they didn’t have enough stock available for my order. I requested a refund and went to buy instore at thier Bodburg branch. This took place in the 22nd of August and till this day my refund has not been processed. I have called over 10 times to no avail. I spoke to thier social media consultants and my messages go unanswered. I called the call center only to be placed on hold with no one returning my calls. I want my money back.