This article explains how to delete voicemail messages in the bOnline mobile app.
How to delete a voicemail
Open the bOnline mobile app.
Select Recents at the bottom of the screen.
Select the Voicemails tab.
Select the three dots next to the voicemail you want to delete.
Select Delete.
Voicemails can only be deleted one at a time. There is no option to bulk delete multiple voicemails.