Just got a call, left no message.

Called me twice in one minute, but I missed them both.

Called 10 minutes ago, some kind of scam

Called just now - left message to participate in a Chronic Obstructive Pulmonary Disease trial. Can call the number back and press 2 to be removed from the call list.

Ha! Ha! Ha!

Managed to keep them on the line for over 5 minutes giving them bogus info.  5 minutes that the couldn't be bothering anyone else.  HA!

They are now blocked.

Buy a call-blocking phone.  Uniden and Panasonic make wonderful call blocking phones and they're inexpensive.  They also come with at least one wireless handset.  Very handy!!!
These phones also block “Out of Area” and “Private” calls.