Similar thing happened to me this week, I drove to my local filling station and started to fill my car with unleaded, after I had pumped in about £15 of petrol, a young man ran out of the kiosk shouting ' please stop! cash only!' I said 'I don't have enough cash, I always pay on my card', he then asked me to go inside, where I was told that the card reader had broken down, and he asked me to wait as they were trying to get the problem fixed. I waited over ten minutes, but had to be at the school to collect my grandson, and so I then told them that I really couldn't wait any longer, they reluctently agreed that I could call back in half an hour to pay, after going to a cash machine to withdraw the cash, I understand why they didn't really want to let me leave, but it wasn't my fault! there were four of us just waiting around there!....I did go back and pay, much to their relief!.......