You can access cPanel directly from your WebhostingNZ client area.
Go to the WebhostingNZ client area:
https://client.webhostingnz.com/client/
Log in using your account details.
If you do not have your login details, please contact us.
Under the Services section, click Manage beside the hosting package you want to access.
On the service management page, click cPanel Login.
You should then be logged directly into cPanel.
If you are unable to access your client area or cPanel, please contact WebhostingNZ support and we can help.