You need to reset the password on the linked EA account that account has the persona Engeis (not lViviMortel that your posting on now) that EA account uses a different gmail email then what is on your swtor account
use the following link to reset the password https://signin.ea.com/p/web2/resetPassword then login on that EA account to fix the swtor account for purchasing
for future purchases, use incognito mode on chrome initially if you purchase on swtor.com to be sure browser cache and cookies is cleared
Having the same problem here
SWTOR account name: Luckytangle
edit: After resetting pw for EA/Forum account, now working 🙂
