In order to access your cPanel first try logging in your Hosting Portal -> My Products and click the "Go" button under cPanel's column for your account.
A new page with two possible ways to access the cPanel will load - via secure or normal connection. Note that in case your ISP(Internet Service Provider) filters the connection and blocks the standard secure cPanel port (2082 or 2083 ), you will have to use the normal connection.
Alternatively, you can access your cPanel directly through:
https://www.yourdomain.com:2083 (for secure connection)
http://www.yourdomain.com:2082 (for normal connection)