I'm at my wits end; and need help.

I have purchased:
FFXIV:ARR - through Greenman gaming.
FFXIV:ARR - through Steam.
FFXIV:HW - through Steam.
FFXIV:HW - through the enix store.

My character is on the FFXIV:ARR game, from Greenman.
I decided to purchase the expansion, as I'm quite enjoying the actual game.

But when I attempt to activate HW on the mogstation; the Steam HW key returns:
"Invalid Key."

After much reading, it turns out steam keys are only compatible with steam keys.
Alright, I thought to myself: I'll just get the bundle. I now have 2 ARR keys, and 1 HW key.

I cannot change my base game key. So my Steam copies are useless.
Steam won't issue a refund on the bundle; because it recorded the game time of me playing on my Greenman purchased copy of ARR and says I'm over their 2hr graceperiod.

That's a steam problem; I'm screwed out of that money.

So I went to the Enix store, and bought Heavensward on their 50% off promo going on now. Got my key, went to the mogstation to activate it...
"Invalid Key."

I've sent in a ticket through the proper help channels and gotten no response.
I just don't know what to do. I'm stuck.

All I wanted was to add HW to my account.
I'm now out of a lot of money; and have several worthless game keys.
Do I block the charge on my card; and just walk away from the game?

Halp.