how to recover my site from the hacker

[alertme]

please i have a problem my site was hacked and the problem is that when i enter my domain name it will take to page and in this page i saw hacked by orkhan39,so please how can i stop this from happening,anyon e can visit the site in the web browser to see what the problem is www.brainbagtut orials.com,plea se i need help to restore my site thanks in advance to my helpers.

[Dormilich]

you have a backup of your website, right?

[alertme]

yes i have the backup sir.