Called just now, no message.

Called twice in 30 min.  No message, must be BS caller

Automated calling system telling me to press 1 to accept the offer for a free cruise.

called now, didn't leave message.  probably spam.

Get True Caller to block.  You get a notice if this call was blocked by others. Cut my spam calls down to almost zero.  And register complaints on Do No Call.  If a number has enough complaints then they can prosecute.