You can contact and checking with your hosting provider if they are suspending your site, It only takes some minute if they do manually unsuspended your account or the second thing is to check your public_html in your file manager and see it you are having a wrong cgi script there.
Other than that, open your site a new window if still it shows suspendedpage.cgi then just press ctrl+F5 key for hard refresh or clear your browser cache or dns cache on your PC as @StrangeDays mentioned
Clear your browser cache (for Windows)
Clear your DNS cache (for Windows)
Enter cmd in the Start menu search text box.
Right-click Command Prompt and select Run as Administrator.
Run the following command:
Most possible case ,You have been suspended by your webhost. First you check whether you can login to capanel/whm, if you can't contact to your webhosting provider. They may have suspend you for policy violation , non payment etc.
If you can login to cpanel , check for any cgi-script in public_html folder, show hidden files also, delete that.
Also don't forgot to clear browser cache & DNS cache.