turn on voicemail notification

[AC Question]

I have a note 5. I have gone through the settings and set to have notifications when I have a new voicemail. However, no notification ever shows up on the top bar. I only know if I have new voicemail if I call it. Similar with my text, i set a notification sound, but never get a sound, only a digit next to message folder on home screen. Anyone any ideas for either of these? thanks