Content there but not showing up!

Hi everyone, I accidentally overwrote my current site when I tried to install a new domain onto wordpress from my host Netfirms. I re-installed WordPress on the first site and now when I log into WordPress.com I see the number of posts, pages and comments I had showing up on the main page, but when I log in, there is nothing there. It’s all completely gone.

What is the best solution for this? Either being able to completely restore my site back to how it was on Friday before I messed everything up or at least recovering my old site data to import to a new site.