Would not leave a message.

Received missed call a week ago, did not leave message.  Answered call today, no response on the other end.

Same just happened to me.

Recieved call from WCA.  It was an automated call asking about a medical procedure and a lawsuit.

rec'd call from unknown number,  and check websites like these to confirm that they are spammers (so thank you for your unfortunate experiences) and reporting them as the $%^&s they are.