Calls several times in a row & never leaves voicemail.

this number called me several times also and never left a voice mail. I called back and they said that I have credit card issues, then they change and told me to give them my pin number for my credit card.
I told them no and they tried to tell me that they just want to see the account detail to inform me on why they are calling.

Credit card fraud!!!

Did they ever answer the phone and ask for you pin number but didn't know which company they are from?