Only let it ring for a few times. No voicemail. I'm reporting this number to the FTC and recommend you all do as well for any and all fraudulent numbers such as this.
Robocall with the message: "Card account there's no problems currently with your accounts. It's urgent however that you contact us immediately concerning your eligibility for lowering your interest rates press 1 now your eligibility expires today consider this your final notice press 1 to be connected with a live operator."