I've had this robocall 3 or 4 times in the last month....starts with the recording - "This is Rachel from Cardholder Services...nothing is wrong with your card". That's when I hang up.
Googled this and found it is a gimmick to get you to switch credit cards. "Rachel" has made 2.6 BILLION phone calls...doesn't matter if you are on do not call list.
Here's an article about her:
Federal Trade Commission Cracks Down on 'Rachel from Cardholder Services,' But She Keeps Calling | Moneyland | TIME.com
Just a heads up if you get the call....hang up immediately.
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Maryland (DC Suburbs) - first 51 years
The Villages - next 51 years