Hey there! You cannot unlink an account without being able to authenticate to it. Bungie will not be able to unlink it for you. You'll need to contact [b][url=https://help.steampowered.com/en/]Steam Support[/url][/b] concerning recovering the account if you wish to gain access to it to unlink it. If that is not successful, you will need to move your good accounts over to a new Bungie profile if you plan to cross save in the future. All emblems tied to your Bungie profile will not carry over to the new one.