WARNING IN SOUTH FLORIDA, CITIBANK CREDIT CARD USERS!!!

This guy talked in spanish with mexican accent call me today and he was asking me for a charge in my MC CC from Citibank, the charge was for $39.95, and then he asked for my CC #, of couse I did not give it to him
The caller ID says: SE CALL CTR SOL, 1-305-762-3421 (Miami, Florida)