Portable POS not working and now its the customer's fault

<p>Its a normal procedure to bring a portable POS (card machine) when delivering products from McDonalds. When we swiped the card, it was declined but we received notification from our bank that it was paid. Normally it corrects back into our account, which it didn't do this time. Thus, the order was paid. The driver left. The store manager phoned to advise we need to pay again. We refused as this meant paying double. The store manager said they will refund if its double. We refused as this is not ethical. She said that we can "just provide bankstatements to prove thats its our account and they'll refund". I lost it. Just because their machine isn't working?! Thankfully the amount reversed into our account and I've phoned to let the driver swipe again. The audacity just blew me over. They actually wanted us to pay double because their machine doesn't work?! No. Bad service McDonalds. This was at the Honeydew Ridge Shopping Centre. </p>