For .htaccess you will need to login to cPanel, then go to file manager > public_html > .htaccess > edit file, and paste the code Mitch has given.
For cPanel access go to:
http://academyofpsp.com:2082 login using your cPanel username and password.
If you don't have your username/password for cPanel, and you are the owner of the account, contact
support@lunarpages.com and they should be able to reset your password(security questions will be asked.).