Changed facebook page username, now it says page not found?

[KDubz]

I updated my facebook page username and now when I try to see my page it says

"The page you requested was not found
You may have clicked an expired link or mistyped the address. Some web addresses are case sensitive.
Return home
Go back to the previous page"

Which isn't helpful at all. I can't speak to anyone because Facebook just have a giant list of FAQ and no human to contact. Anyone here help ?
The old URL isn't working either so now my page doesn't have one? If I click on my page (top right) like you do to view your own profile it just says "the page you requested etc...."

[Lemon]

The page might have been deleted.

[Gilang]

same here... update my facebook page user-name and then now its gone..

Anyone can help?

[Carol]

Me too! Having exact same problem, thought it seemed a good idea a few hours ago to add a username, but now am gutted! PLEASE can anybody help as have worked really hard to get my page going with good links to my music class attendees!