Hi there. I'm sorry to hear this has happened to you. We highly recommend you change all your passwords and enable 2-factor authentication to prevent further access. You may find more helpful tips from Bungie's [url=https://help.bungie.net/hc/en-us/articles/360048721292-Account-Security-Guide]Account Security Guide[/url]. Removing an unauthorized account is not an issue Bungie support can help with. Issues with account access need to be directed to your platform's support team. To unlink the Xbox account you must disable Cross Save, which requires you to authenticate the login credentials of that account. If you can't authenticate it, then the Cross Save will be permanent. [url=https://help.bungie.net/hc/en-us/articles/360049498031-Destiny-2-Cross-Save-Guide]Under no circumstances will Bungie forcefully unlink or remove an account[/url]. Unfortunately whether due to accident or unauthorized access, Bungie does not recover deleted characters or items, and does not replace in-game items that are lost or dismantled. https://help.bungie.net/hc/en-us/articles/360048717732-Deleted-Item-and-Character-Policy