This is a non-issue as I very clearly stated that I do have access to the account (I'm posting from it now), what I don't have access to is a device that can run the game.
Not being able to merge as a founding warlord is absolutely nonsensical for an account that is remaining the primary, the issues I've seen so far indicate that does apply for founding warlords on non-primary accounts that are being overwritten though which doesn't apply in my situation. My issue is more whether or not I need to have crossplay enabled for the merge.
If I have to go through support though none of it matters as there's no chance I get a response before the upcoming wave ends/gets cut off which means I'll be waiting till next year regardless.