The victim then convinced them that the transaction was fraudulent.
They asked for the card details and when they were convinced they promptly blocked the transaction and reverted the amount which reflected in victim’s bank account in a couple of days.
But there is prevention and there are ways for a cure.
So instead of crying over the spilled milk one needs to find ways to recover or salvage.
From my opinion police will also not be able to help you much in this case as often such financial frauds happen far away in a different country.
For example if you transfer money to the scammer by say Western Union or Money Gram and you realize that it was scam in less than 24 hours you have very good chance to get your money back.Bank will always try to put the blame for card fraud on you.Usually they will redirect the victim to go to police for further help.Every victim may not be lucky as in this case but one can always try to reach out to the merchant through whatever possible way and give them the real picture.The chances of you getting your money back then become stronger.
No merchant would like to do business with a stolen card.