[Resolved]  HDFC Bank — got fraud call for atm verification (this number [protected])

I got a call from [protected] and he told that your atm card will be blocked as your aadhar card number is not linked to your account. Please help to verify your some details and provide aadhar card number also so that we can update in our records. As i already linked my aadhar number to bank account, so i thought it could be a fraud call to know about the details of my atm number. And the same happened, he asked for atm no and cvv first. So i refused to give that asking that no bank ask card no and cvv on phone, then why you are asking for it. He disconnected the call.