Robo Call - saying they are a nonprofit and offering debt relief.  If you hit 1 - they say a volunteer will answer your call, but no volunteer answers - they ask you to leave your phone number and message.

No option to get off their call list.  

Apparently being on the national do not call list does you not a bit of good. I get these calls all the time even though I'm verified as being on the do not call list.

How do we combat this harassment?

received call on home phone at 6:00 Sat. evening. CID says DBM...Didn't answer. Area code in Southern California. I live in So Cal. Spoofing phone numbers in this area.

they use different numbers to harasse people. just don't answer it if you don't recognize the number.