Caller ID says "Paul Blundell". They leave no message.

I know no one named Paul Blundell.  I googled the name.  There is some one of that name who does "wealth management".  Perhaps this is an investment scam using this guy's name.  I have contacted no one recently about investments.

I call back after hours (using *67 to block my number).  I hear the following "The number you've dialed is disconected but we might help you find an alternative.  Please, hold the line while the call is being transferred to a free directory assistance service.  Press any key to continue.  <I press no key>.  Goodbye."  They hang up.  I tried again pressing a key, again the machine once again hung up.

Spoofed caller ID.  The inability to be called back.  My guess is that it is some kind of SCAM.  Based on the name, I'd say it might be some kind of investment scam.