Caller ID says "Cell Phone  AR".  Their software is too stupid to wait for the beep, so I have reconstructed the beginning of their message from previous attempts with other numbers, "Hello, this is Rachel at card holder services, calling in reference to your current credit card account.  There are no problems currently with your account.  It is urgent that you contact us concerning your eligibility for lowering your interest rate.  Please, consider this your final notice.  Press the number “1” now to speak with a live operator and lower your interest rate, or press the number “3” to discontinue further services.  Thank you, and have a great day."

I call back after hours (using *67 to block my number).  Their outgoing message says, "Please, leave a message for <crying baby noise>."  I strongly suspect that this number has been spoofed.  Likely a scammer got an earful from someone at this number.  Now the scammer has spoofed them so people will call and yell at them (thinking they're the scammer).

In case you didn't know it, the "lower my credit card interest rate" thing is a complete SCAM.