wordpress upgrade went wrong need help to repair installation

Hi I decided to update my WP version to 3.3 on my site [[login to view URL]][1] I did this after having updated the All in one SEO which resulted in me not being able to login via the wp-admin. I discovered that the All in One SEO wants 3.3 of WP so I upgraded. Stupidly I did not back up files and simply upgraded to WP 3.3 from 2.7. Now I cannot access the site - I recovered things so that the site loads but no actual data is displayed. If there is a WP expert who could help recover this I would appreciate it.