I once had a phone call from a man with a strong Asian accent. He said that he was from the fraud section of my bank and there were a number of suspicious deductions from my bank account. He went on to say that " I'm not going to ask you for any details of your account" and at that stage I interrupted him and said that's good because I'm not going to speak to you and will hang up
He then told me to phone the number on my card and then ask for the fraud squad which I later did. After a series of security checks I found out that my account had been hacked 5 times and in fairness to my bank all the money stolen from the account was refunded to me
You can never be too careful with these matters