@SenhorBar
You need to reset the password on the linked EA account that account has the persona senhorbarty (not senhorbar) that account uses the same email as on your swtor account Senhorbart
use the following link to reset the password https://signin.ea.com/p/web2/resetPassword ( using the swtor email ) 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.
let me know when you think its fixed and i can check further on the purchases
edit - your case is confusing will try and clear this up
The EA Account called senhorbarty is linked to the swtor account Senhorbart and they both use the same email and that EA account needs a password reset per above
The Swtor account called senhorbarty (not the EA account senhorbarty) has had the linked EA account deleted and is now permanently broken ( that account needs to be locked )