Hey there. To access this Bungie account, it has to have a platform account attached to it (ex. an Xbox account). To do this, the platform you want to attach to the Bungie account cannot be linked to another Bungie account. Open an incognito window (important!) and click "Join Up" to create a new account, and use the platform account credentials that were originally linked to the Bungie account to log into the site. Once you do this, the Bungie account should appear with the option to "Recover" it. Click it to complete the account reclamation process. All that being said, this is an advanced procedure and there is limited support for it, so if you can't recover the account there is nothing more than can be done as we don't have the ability to force links between accounts. You can find more information about how to possibly recover this account in our [url=https://www.bungie.net/en/Help/Article/12130]Bungie.net Account Creation, Linking and Recovery article[/url].