Udio — someone called from audio and asking my credit card cvv to refund back money to credit card

Someone called me on my mobile number & introduced as rahul tripathy from udio to solve my issue and was asking me to provide credit card details (From the account i deposited money to udio wallet). I provided him credit card number with expiry date then he asked me to share my credit card cvv number but as i know that if i share cvv number to any person he can easily do fraud transaction from my credit card. So i didn't give him the cvv number. At last he replied that he can't do anything without the cvv.

Thank you
Tamal