Can't use cerberus key on origin because it's linked to my old Bioware account.

So back when I got Mass Effect 2, I had to register a Bioware account. So I did that. Many years later I have an Origin account with a few games and found that I could add ME2 to my Origin collection using the CD key. Great, I cna keep all my games in one place!

Problem is that my cerberus key won't work because it's already been used.

By me.

On my bioware account.

... and apparently my old bioware account is now an Origin account so there's no clear way to merge or link it to my real Origin account.

What I would like to do is just merge this forgotten Bioware/Origin account into my current account so that everything is all in one place. Word around the internet is that I might be able to do something if I can talk to an "EA Game Advisor" but EA's own support system said that this is the "Best way to get help" and offers me no alternatives.

It's really frustrating, by the way, that I can't even FIND an email address or phone number and the live chat says "try again later". So here I am posting on some community help forum, hoping maybe it will help somehow.