Welcome to the community!
Sorry to hear you are unable to set-up your voicemail. In order to change your voicemail to English, you would need to contact customer service. Alternatively, you might consider sending @FidoSolutions a PM. Once they verify some information, they will also be able to access your account. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
Hope this helps 😀