My bungie.net account was hacked previously and I was able to get it back but while it was hacked an xbox account with the username ChemicalReapers was linked to my bungie.net account. However, in order to unlink the account I need to be able to authorize it but I can't because it isn't my account so I don't have access to the email or password. I contacted xbox support and they told me that they couldnt give me access to the account and they couldnt unlink it from their side either as they didn't have access to services linked to the xbox account.