Refund policy disgusting

I went to Builders Warehouse New Market to buy a gas stove. It was delivered last week Saturday (5th Feb 2023). I sent the stove back with the truck as it had a deep scratch on it. The store did not have any other stock so they refunded the value of stove onto the builders card. They did not refund the delivery fee. I went into the store on the Sunday to ask for the refund on the delivery charge and to take the money off the builders card and back into my bank account. Please note this purchase was over R15000. I had to supply proof of banking details etc before they would transfer the money to my bank account, or so I thought. After I had given all my details, they then tell me that I have to wait 2 to 3 business days for the refund to be done as it has to go to head office. Well it is Friday now and I still have no money in my bank account. Nowhere in their store do they say you have to wait for a refund if your purchase is over R10001. This only shows on the refund document I was given (not even the original document but a copy of it). I have now been with out a stove or oven since Friday last week. I can't go buy one from another shop as I don't have another R15k lying around. I have been speaking to the store and the store manager a few times this week and they keep saying the refund will be done today. Today the lady said the transfer has been done. I gave her my email address to send proof but have not received anything. Builders Warehouse this is disgusting. I will not buy another from you again.