Hello @Smudger23 ,
Welcome to the community,
I take it you are abroad right now? You should have set up a PIN number before going abroad for voicemail.
This here might help give you the answers you are looking for:
https://community.ee.co.uk/t5/Mobile-Services/EE-Voicemail-All-you-need-to-know/td-p/1138342
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using Skype or another phone: +44 800 079 8586 or +44 800 956 6000.
