Why can't I log in with new user name and password.

My account was hacked. I created a new user name and and password. I was able to use the account with the new user name and password for a little bit, but now I can not log into the account with the new user name and password or the old user name and password. I keep getting this notice: Something is technically wrong.
Thanks for noticing—we're going to fix it up and have things back to normal soon.