Bad service

Im utterly disappointed in this store, I bought items worth R25576.00 on 24 December 2019 in cash. I was told that there was items that were not in stock but it will be in the first week of January 2020. I nw get called on 10 jan by a delivery guy telling me he is delivering 2 of the 3 items I purchased. I asked what about the third item and he says I need to sort it out with the store. No at the store can assist at this time, then a lady calls me and says we dont have stock, and requested a refund. She puts me through to another guy wu also says they dint have stock and if I want a refund I must go back to the store, instead of trying to find a solution to keep the customer happy im just told to go to the store , I want my money transferred back onto my account, and if someone can please tell me if its necessary to go to game canal walk or if it can be done at any game store.