Your cPanel control panel is accessed using a web browser and typing in your domain name (with extension such as .com, .co.za etc) followed by a forward slash (/) and then the (cpanel).
Here is an example: http://www.domain.co.za/cpanel
So if your domain name was domain.co.za then you would access your cPanel at http://www.domain.co.za/cpanel
The username and password can be found in your welcome email title New Account Information, which would have been sent to you when you purchased your hosting package. If you do not have the correct login, please contact Stallion Hosting for help using the Contact Us form available here: http://www.stallionhosting.com/support/contact.html