Hi Vicki. There isn't a way to restore a site from a zip archive. You can use the content to rebuild the site, though. What happened to your website, and how is it messed up? Can you post a link to your website as well? Thanks!
The site archive is meant to be a personal backup of your content and not something that you would use to restore with, although you could re-add content you accidentally delete on an individual basis since it would be contained in the zip.
