It's a phishing call trying to get your credit card info. The number that shows up on caller ID is spoofed because they are using VOIP. Whatever you do DO NOT give them any info.
These people call me at least once a day! I have gone so far as to press "1" so I can talk to a real person and tell them (1) I have no credit card debt, and (2) this number is on the Do Not Call List. They promise to stop calling, but they just keep on! Is there nothing we can do to stop this?