You may need to login on this helpdesk URL , login using your control panel username and password (not email address).
If you're still using old control panel (http://copanel.aspwebhosting.com.au) ,
You need to select "In House Control Panel" on the Control Panel dropdown type.
Click "Submit New Ticket", Select Ticket Type, Domain Name, and provide the details of your issue.
You can follow this KB to see the login detail for your control panel.