Locked out of WP dashboard

Was doing some SEO admin on my website (www.supersavvysteph.com) and I have accidentally moved my WPHOME ( was http://www.supersavvysteph.com/admin/wp-admin ) to the same as my SITEURL and now I can’t log in. The content is still showing but my theme twentyeleven is not showing correctly)

Have read the changing the site URL page that many people have suggested to people with the same issue.

IT HASN’T WORKED!

I don’t know why, or how come. I tried editing WP-CONFIG with the suggested text, I also tried editing the FUNCTIONS.PHP and that doesn’t work either.

Can anyone help please? Don’t have much coding knowledge but If it is explained simply I should understand!

Thanks in advance xx