Today I made a fuss in the petrol station, as I needed to put my PIN in twice (they said the machine was giving problems) and they did not give me a reciept showing cancelled transaction. The people behind was getting really wound up as it caused a backlog, lots of sighing, muttering, underbreath cussing. I refused to leave without a signed stamped reciept from the manager saying it was a void transaction. I was not loved when I left. I consider this unfortunate for the people behind me but sensible for my own benefit. Do you stand your ground or do you back off in this kind of situation?. Whats right in your opinion?