I emailed support@swtor,com.
Sent 3 files as requested by ea help site. (Steam transactions).
What the problem was I had a inactive EA account that was linked to Swtor account and so it could not process my subscription.
They told me to get EA app from the EA site and login. I had not had this app in years.
Once that my old account was active again.
I sent an email and they fixed the problem.
Hope this helps
Regards