I saw "CardServices" so I let it go to the answering machine. This one actually left a message, unlike most robocallers, but it was unintelligible. Began mid-sentence and said something about a "final notice" about "the stimulus."
Real calls about your credit cards, like from a card issuer's security department to confirm suspicious charges, are normally made by live people and they leave a real message.
Calls like this make me wish Verizon would bring back the option to block calls from specified numbers.
String them along! Waste their time! Scam callers only get paid if they manage rip you off! The more of their time you waste, the fewer calls they'll have time to service and the less money they'll make!