For your Angel Watch™ to work correctly, you will need to 'Area’ in the login screen to log in with North America.
When trying to log in, if you see 'Account Error', try logging into the other account regions and one of them (the one you accidentally registered in) will let you log in.
Once you're logged in, click ME, then ‘Delete Account’ and re-register a new account making sure you’re doing so in North America.
You may use the same email address as the previous account was deleted.