Abysmal Online Shopping - No Stock and No Refund!

I placed an order on Friday evening. Items that were marked as on special suddenly revert to full price on checkout with no notification that the price cannot be met, even though area was correctly selected. I only noticed it when reviewing my order and had to go back and cancel those items. The cash for the order was deducted from my account on Sunday morning. Collection was for Monday, 15km from my closest PnP. On arrival they claimed no stock of two items to the value of R250, but they have already deducted the entire amount from my account. This can only mean they had the stock but sold it in-store after I had placed the order. There was a lady in front of me with the same complaint, order placed and paid for and they say no stock when she arrived to collect. The manager said there was no way to refund the amount, I have to wait 1-7 days for a credit; I am still waiting. The manager would not take responsibility for arranging a refund, would not even allow me to purchase in-store to the value, or credit my smart shopper account. There is absolutely no facility to refund to a credit card, though I have shops do this in the past. The manager advised me to call their call centre. My first call did not go through, my second call I was put on hold, and then cut off. The amount of petrol and time that was wasted, and then I still had to go to other stores to get the missing items. What a disaster during Covid lockdown when online shopping should be a safer option. I will never shop online with them again, and am still out of pocket.