I've tried to post a reply in the Official GOT thread Vol2 but everytime I click reply it says "I've been denied access to it". Not sure if/why I've been banned? from it but checking my post history I haven't posted in it in a verrrrrrrrrrrrry long time.
You had a post deleted from that thread in August 2017, so the thread ban is likely to have been at the same time. You should have received an email explaining.