They change the restrictions 5 times a day, so refreshing repeatedly isn't going to help. As others have said, try early morning. Good luck!

"Updates on Character Creation Restrictions can be found here.
During periods of high congestion, we may institute a temporary restriction on the creation of new characters.
This information will be updated at the following intervals:
4:00 a.m./ 8:00 a.m./ 1:00 p.m./ 6:00 p.m./ 11:00 p.m. (PDT)"