abuse

If you’re having issues with wordpress.com, then you’re in the wrong support forum and need to ask your question at:

http://en.forums.wordpress.com/

This is the forum for self-hosted wordpress.org installations.

Having said that, the correct link for you to sign into your blog would be

http://yourusername.wordpress.com/wp-admin

If your blog is not hosted at wordpress.com, and is a self-hosted one, then the correct link would be something like:

http://yourdomain.com/wp-admin

but this would vary depending on whether you’ve got .com, .org, etc and in which folder you installed the software.