Forum Discussion
I have flagged the creation issue back to Bioware to say it isn't fixed after they thought they had (link), they will let me know when they have more info on this.
In regards to the old account, the email address is the crux of security for the account, if the swtor account was tied to the origin account you use then updating that email would of updated the swtor account, but I presume they arent linked as I would guess you already updated the origin account email.
Due to account privacy they can only action changes like the email address over the phone.
The one time password you mentioned is a one time use email not just get one time, once you get access back to the account if you put a security key on the account it stops the need for the emails.
Hope this helps
I've changed the email on my EA to my current email, and tried logging in, but to no avail.