I purchased this pack on Steam this past weekend (they had a small discount on it), but never received the content... This may be an issue with Steam, and thus might not have anything at all to do with you, but I figured I'd message you directly to make you aware of it in case there actually was some issue with the files being delivered to them... Because their support team is wearing out my patience by repeatedly suggesting "solutions" that I told them I had already tried in the very first email. The content simply doesn't exist, there's nothing that I can download, and I've been repeating this to their support team for going on 3 days now.
I already own a lot of your other packs and have never had any issues with them, but when I look at the Properties tab for the RPG MAKER software, it shows the Doomsday pack in the list of DLC that I own, along with all the other packs... But in the area where it should list the file size, its just blank, suggesting that they don't actually have any files to download -- and so of course there is no pack in my game's local DLC folder.
Again, it may be entirely their fault, but I figured I'd make you aware of it in case there's something you can do about it or something you might need to contact them about... Because I'm not having any luck with them.