We have always taken cash when abroad for reasons but last week got caught out with lack of fuel so went into a town and found the local garage closed for couple of hours and it was open to card owners.So put card in and chose fuel, pressed "V" and put pin number in, nothing happened and card came out so had to wait the 2 hours .It was my own fault for not learning how to do this simple job. So what is the correct way of using the machine?.