I can't logon!!!!!!!!

Instructions for repairing it are in this article.
Changing The Site URL
The phpMyAdmin method is pretty easy.

What’s the phpmyadmin method?

You should probably read the page I sent you to. Read all of it before deciding which method will work best for you.

Changing The Site URL >
Changing the URL directly in the database >

“If you know how to access phpMyAdmin on your host, then you can edit these values directly to get you up and running again.”