Welcome to the Community, I'm sorry to learn about the problems you're experiencing in trying to set up voicemail at the moment.
What happens when you dial 222? Listen to the message until the end (if you've not already) and press 1 if it asks you to. After 20 minutes of ending the call, turn your phone off and on and your voicemail should be set up.
If you try the above and still get no luck, respond to the private message I've sent with the requested information and I'll take a closer look for you. You can view the message by clicking the purple envelope non the top right of this page.