Online system failure prejudices Black Friday customers

Having placed an order on the Makro online system on Black Friday, putting in my credit card details, and getting an order number, I then phoned after the suggested waiting time only to be told that the payment had not been received, and they would not honour the prices in the original order. If this was a problem only for myself, I could have accepted that perhaps there was a problem with the bank, but on Facebook, I have seen several people who have experienced the same problem, leading me to conclude that this was a problem with Makro's system. The goods should be made available at the price they were ordered. I requested this on the Facebook page, but got no response.