Is there any1 who can tell me how can i get to reset my DOMIN Cause My WEB wAS HACKED BY SOME1 i GoT my pass back then I delete My WEB FILES WHICH WERE INFECTED By A malwear . Now i m Not Able To re edit my web page i m getting this error on my Page when i open that

Warning: main(mainfile.php) [function.main]: failed to open stream: No such file or directory in /home/*/public_html/index.php on line 15

Fatal error: main() [function.require]: Failed opening required 'mainfile.php' (include_path='.:/usr/lib/php') in /home/*/public_html/index.php on line 15
A request to retrieve your website login information has been made at Lunarpages Web Hosting. Below, you will find your Lunarpages Hosting Account username and password, as well as the login address you can use to access your website.

can some 1 help me ?
 

* - edited by Mitch, removed user name