just remove subscription pay method here on account settings
That will close account and you dont need to log into game
Of course doing it this way they removed the closing feedback pop up (but I think its safe to say the cancelling of subs feedback was going unread anyways this past 14-15 months)
But least you still will be able to cancel account!
I did it yesterday myself
Except if you have a security key bound to your account, you need to enter that key just to log on to the website. If your security key is fubar'd, you're pretty much fubar'd.