It is supposed to be reflected on your account after the Sep. 3rd-4th maintenance was over, but I have checked my account on the Mog Station and it does not show the extra 7 days.
For that matter, I still haven't been able to create a character on the server I need to be on and play, so not getting the 7 days at this point just makes the 30 days included with the purchase of the game feel even worse.