Is the blog you listed here the 'deleted' blog? If it is then the blog itself still exists, it's just the content that has been 'deleted' and is most likely hiding in the 'trash'. Read more about that here: http://en.support.wordpress.com/trash/
Or it could be that your previous content needs to be migrated to the new blog location.
Deleting a blog in WordPress requires quite a few clicks through a few warning screens. You can see the process here: http://en.support.wordpress.com/delete-site/
If you don't recognize the process outlined in the support document, there's a chance that your old pages and posts still exist, you may just need some help finding them.
Keeping my fingers crossed your content can be recovered.