Hacked By admin hacker

I don’t know what version of WP I’m using, because I can’t get in to my Dashboard. I always update though, so I’m assuming it’s the latest version.
My problem is that my login no longer works. When I ask for a new password, I never receive the e-mail. I’m afraid that the hacker has changed the contact e-mail. Is there anyway I can get back in?
My site is http://blissdesigns.net/
My web pages are fine, the only one hacked is the blog page:
http://blissdesigns.net/sale/
I’d love to log in and just delete that page, but I can’t! Any idea what I can do?
Thank you
Anne