A 301 redirect sits in the .htaccess file at your servers root level, it's real easy and you probably don't need to make yourself feel helpless by asking your webhost. Just add a line using notepad like:
Then delete the rest of the site and if you want to be a real smarty and do a clean job of it put a 404 redirect on all your other pages that goes to your homepage (which in turn will redirect to the main URL). This way spiders or visitors entering below the root level get nicely transported around and give it a month or two and the whole thing will be but another chapter of net history.
Danielle