The first thing is to login to your CyberHub webhosting account using your username and password. Login to your cPanel webhosting account at https://web1.cyberhub.co.nz:2083/ your username and password was emailed to you when you signed up. If you have forgotten your user name click on Reset Password.
Below is a step by step tutorial about how to add email addresses to your webhosting account or you can go to http://www.cpanel.net/media/tutorials/emailaccounts.htm and watch a video tutorial.
Once logged in click on Email Accounts
Now enter the email that you would like, then a password, then set a mail storage limit, then click Create Account.
You will then see the account that you created under Account @ Domain.
Now simply create all the email accounts that you want for your domain name.