You need to reset the password on the linked EA account that account has the persona mblaminack596 (not SenorGhost34 that your posting on now) that EA account uses a different email then what is on your swtor account and is a yahoo email
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
I have never had an email like with those numbers or on yahoo.
The EA account has the persona mblaminack596 and it uses a yahoo email
if you do not know the yahoo email your best bet is to call swtor support when the lines open
