Your banking data (accounts and cards) are strictly confidential: they belong to you and must not be communicated to a third party, even a trusted one.
Make sure you know who you're dealing with before passing on any information or carrying out any action requested of you*. If in doubt, hang up and contact your advisor through your usual channels.
* Be careful, the phone number displayed may seem legitimate or known to your contact list (bank branch, customer service...), but in some cases it may have been spoofed by the fraudster. The fraudster can personalize the number displayed: this is a case of telephone line impersonation. Also check the e-mail addresses of people who contact you.