Failing to process my Refund

I bought my babies Similac milk for R380 online at Dischem Ferndale on Republic on the 20th of January. I realised after processing the payment that the delivery address on my profile is wrong. I called them and tried to change it on the App bur it didn't allow me. A lady at the shop who works with online orders cancelled it and till today, I haven't received my refund. I have been calling their head office and the Ferndale shop and it's a back and forth. head office says the shop will call, the shop will tell me that head office has sorted it out. How can a refund between South African banks take 14 days? To my knowledge 72 hours at most but it's been 9 days.