Voicemail won't pick up

Yes I know how to use this but I'm trying to figure out why these calls won't go to my voicemail like all my other calls do.

Cycle Voice Tools settings.  Change Spam Blocker settings and press Save.  Then change settings back and press Save again.  If that doesn't work, put your phone down and use a computer.  If that doesn't work, change 'Send to Voicemail' to 'Block'.  I know that works.

Makes no sense to me because all calls should go to the voicemail regardless of what they are.  (Correct)?

Hi, there. I'm really sorry about the issues you've had with your voicemail service and I'd like to help. Please email us the physical address and any other pertinent information to Cox.Help@cox.com with your name and a copy of this forum message. We're glad to look into this for you and help out in any way we can. 

Yes, if you selected "Send to Voicemail", all applicable calls should go to voicemail.  But stuff happens.  That's why I suggested you re-cycle settings.  I didn't select that option so I can't tell you if it actually works.  I do know that "Block" works though.  
 

I can't answer that.  Maybe a moderator will reply.

'Spam Blocker" is one of the best features Cox has implemented.  I go days without receiving an unwanted call.  When I do receive one, I block the number with "Call Screener'.  

Yes it's working on my phone browser.