Refuse to refund after their systems malfunction

I used their self service ordering system to order two meals. Luckily I took a picture of the order number. I decide to tell them how I wanted my eggs to be done for the breakfast meals. That is since their system gives your no option to customise any further than choosing a different beverage. Lady at the tills prints out a slip stating that the pos failed to register the order. Yet, yet the transaction went through and I have a picture to show. Manager comes by, Cornie, who is very subtle in her engagement with me, but indirectly hostile. Basically short of saying "tough". It's. Or on our system. I told her I do not see how that is my problem if it's your system that malfunctioned. If it had not confirmed, I'd be happy to start another one, but I am not prepared to double pay, because it confirmed and issued an order number, which I showed her. She walks by to fiddle with the self service device and says to me, "see, nothing ". I told her then give me my money back I no longer want your meal. She refuses and says if it's not on their system, nothing they can do. Despite showing her it's in their system, it probably failed to link back to complete the order but did in fact take the money successfully, as that is how it works, I know how they work. I've written a couple of applications myself. She says the fact that it's only on the one device and not in their list of orders means there is nothing they can do. At the time, the SMS from the bank had not reflected anything. So I gave her benefit of the doubt, that perhaps it did fail. So I told her if I get notification of the funds coming out if the account, I will be back to get my money . To which, what felt sarcastic to me, she said,.. not a problem. I walk away, five minutes after, notification from the bank comes through. I walk. Ask for her. She comes, already with a straight face. I show her the notification and asked for my money. She says this is reversal. To which I asked her to pay attention as reserved for purchase is quite the opposite of reversal. She then said well, unfortunately your phone is nothing to go by. Go to the bank and ask for a bank statement. To which I did not understand, how is that different? And why would I want to share bank statements with them without any contract prohibiting them from using that information for anything else. It also meant I have to now drive to the bank, waste my time over and above having done so with her already , drive back. I told her, by that time, R167 wont be with fighting for, because time and money spent would have been more than that. To which she says , well this is not the first time this machines do this. It happens all the time. Then I was upset because all along she made it seem I was the one not telling the truth . Said nothing a out the process, which she now suddenly feels it's time to tell me in 24 hours, only then can I come back as they money MAY be reversed. She was untruthful and tried to make it seem like she did not understand why things were happening they way they did. Yet now, it happens all the time. I left with a bitter taste and not coming back to buy from this stupid shop or KFC in general. Imagine I had no more money, with hungry kids and now I wouldn't have anymore money to buy anything from anywhere, because sisCorny says I must wait for 24 hours, after dancing up and down proving to them that their system actually did ***** the money. Yet, it's something they know already.

I feel the lady was untruthful. And I feel they should remove those self service machine if they do not work and stop wasting people's time.

Technically, KFC remains a ***** and I still want my money. But now I have to spend time and money to get it ?