An unknown XBox account has been linked to my Bungie account. I've asked XBox Support to remove this link, but only Bungie itself can.
I even got an email from XBox support that the account is not mine and should be decoupled.
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Hi there, Due to mandatory security policy, Bungie is not able to remove connected platform accounts from Bungie.net profiles under any circumstances. If your account has been compromised, we are unable to assist you. Account security is up to each player, and we encourage players to secure their game accounts by following our [url=https://help.bungie.net/hc/en-us/articles/360048721292-Account-Security-Guide]Account Security Guide[/url] so that they don’t have a chance to be compromised.