I was scammed at the cashpoint at Sainsburys  Dog Kennel Hill yesterday. I put in my card and pin . Someone was running towards the carpark away from my general direction  [ without shopping] and shouted over to  me that the machine takes cards and not to use it [ but I had already inserted the card and PIN] I looked back at the screen and I could not progress anything and the card did not exit. I spoke to some staff who were at the corner talking to each other and they told me that the machine was working and that i should contact my bank, but that someone else had recently had a problem with the card being retained. I called the bank who said they would stop my card.  Another person approached the machine and i warned him. He said he would take the risk and carried out a transaction [ you don't want to look too carefully when someone is operating at a machine]. I did my shopping inside Sainsbury using a different card. When i came out i discovered from my telephone banking that cash withdrawals had been made at  'Grove Vale Serv ' for about £251.99 and £41.99.    I am sure that no one was by me when I first used the machine and can't work out how this all happened. I reported this again to the Bank who confirmed my card had been stopped -[ but obviously not in time.] All of this makes me feel so stupid and was expecting the bank not to believe me as it all sounds so implausible[ although they didn't say that]. I really don't know what i could have done to avoid this - apart from not using that machine ever again. I have reported it to the police ' online'.