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This is not solved
Well I'm not surprised considering you posted it 44 minutes ago.
Mods might not get to this post until tomorrow.
If this is an urgent issue for you and you require a fast solution, I would recommend calling Vodafone or Using their chat client to speak with someone live.
Sorry to hear you're having issues with your voicemail.
If you private message (via the link in my signature) over the below info, I can look into this for you?
Date of birth:
Link to your thread or post: