HTTP error 500

Hi,

I was working on the WordPress page when I came across the HTTP error 500 problem. This happened when I was removing some code. However, the problem is that I can’t access the admin page. I have setup FTP however, I do not have the details and cannot get ahold of the host at all and don’t know any of the details. What can I do to resolve the issue. All I have is the site login details. No WordPress site details and access to FTP or any files. Any way to resolve this?

The page I need help with: [log in to see the link]