Unfortunately you had to have downloaded both dlc prior to 8/31/15 to qualify for the quest
You said you downloaded 1 in September which was after the requirement date
So unless you had a character over level 30 by that date you have missed out on the quest
Edit sorry mis read your post it read like you downloaded how on 9/15
https://www.bungie.net/en/Help/Article/13559
English
-
Yes, sorry for the confusion there. So, is all we have to go on that note from 5 months ago saying they're working on it?