There are four ways you can retrieve your voicemails:
1) Using the HulloMail mobile app in the message list
2) Via the web portal - Click Here
3) Calling in with the following numbers:
o UK Subscribers call: +441216218500
o US Subscribers call: +12026885555
o Ireland Subscribers call: +35314849000
4) If you have a subscription, you can enable the option 'Copy to Email' which will automatically send a copy of the voicemail message or missed call to your registered email address.