Well I reopened my ticket again and after some explaining and the advisor actually listening, I got all my content as I was meant to. I watched them actively flag it while my origin client was open and it begun downloading. Sadly I think some advisors are either clueless, or just couldn't be bothered, but if you can be patient enough to reopen a ticket and wait for one with common sense, you'll get it sorted. The person I got, was simply called Manoj, as per my transcript, who was quite helpful and understanding.
Just make sure you ask for exactly what is missing, if you got the Inquisitor's Edition you should have the following things in your Addons and bonuses list:
Flames of the Inquisition Weapons
Flames of the Inquisition Armor
Flames of the Inquisition Armored Mount
Dragon Age: Inquisition - Deluxe Content
Dragon Age: Inquisition Official Game Soundtrack
In addition to the code "DAI Inquisitor's Edition Registration Code" you should have from the Steelbook case and of course that "Dragon Age: Inquisition English Voice Over Pack". Also you'll find the Official Game Soundtrack is tied into the Deluxe Content flag, when they flag your account with that, the soundtrack one will automatically add after.
As for the Red Lyrium Reapers Weapons Pack from the promotional webpage, I'm not sure if that flags on the addons and bonuses list or simply appears in game automatically, I would like someone to confirm that. And I'm still awaiting my Collector's Edition Strategy Guide for the Dracolisk Mount, Premier Ring of Insight and Multiplayer Chest, so I can't confirm how it appears either.