The best advice for dealing with this kind of fraud is knowing that there are exactly three things that can happen in a conversation with the fraud department.
1. "Did you make these purchases?"
2. "Yes" -> "Thanks, bye."
3. "No" -> "Thanks, we're disabling your card, and sending a new one to your address. If your address has changed, please pick it up at the branch."
Any deviation from this is a scammer posing as the fraud department. Any attempt to gather any information from you, besides 'Did you make these purchases?' is a scam.
They know who you are, if they didn't, they wouldn't be calling you.
1. "Did you make these purchases?"
2. "Yes" -> "Thanks, bye."
3. "No" -> "Thanks, we're disabling your card, and sending a new one to your address. If your address has changed, please pick it up at the branch."
Any deviation from this is a scammer posing as the fraud department. Any attempt to gather any information from you, besides 'Did you make these purchases?' is a scam.
They know who you are, if they didn't, they wouldn't be calling you.