I have read several threads of people who I think are having exactly the same problem as I am, and none of the solutions offered work.
Here is what happened. We'll see if others have the same thing going on:
Used an old email to create an Origin account years ago.
Stopped using Origin for a while.
Started using Origin again, updating my email address because I couldn't remember the old one.
Gamertag is not properly associated with the account anymore.
Can't create a new persona with the new email, because when you try to create a new persona, the page is broken.
What I need:
Someone to reconcile my gamertag with my new email address. Or, delete my account and allow me to create a new account completely, which I think would also work.
What I do not need:
Another link to the Origins Help page.