Is a fraud call.
They will say calling from any credit card center (maybank/Cimb/public bank/citibank and others)
Giving you free insurance/gift and others.
They will tell you, your credit card number (front number) and confirm with you.
Then ask you to tell them the CVV number (Security code back number)
Once you tell them the CVV number. Consider they can use your card already.
Please call to you bank and cancel as soon as possible.