I might be wrong, I think the main problem here is that your steam-account is/was registered to an email-account that no longer exists. If you had updated your contact-information BEFORE you installed the game, the case might have been different, and you would most likely have gotten your code.
You also cannot move a Steam-game between accounts as far as I know, which negates the possibility of creating a new account and moving your game to it. Games bought on Steam is locked to the account it was bought with, for obvious reasons. The only way I know of to get a working copy of a Steam-game over to another Steam-account is to purchase that game again with the correct account.
Lastly, unless you already HAVE done so (didn't find a clear answer to this in your previous posts), you should change your contact-info for the Steam-account that you bought the game with so that when Steam-support contacts you, the email ends up in an email-account that you can actually read and respond with.
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