account is being used for someone else's xbox gamertag without my consent. how do i unlink it?

you cant link a current xbox account to another microsoft account, the xbox account IS the microsoft account, so when a microsoft email/account is created it also creates a generic xbox account too.

so you are probably signing into an xbox with a different email and password that is different to your other email address is that correct.

Thanks for contacting us my name is Samy, I am advisor independent and I will be helping you today.

How are you, mate?
If you change your account password on any other device your account is being used on will be logged out and ask for the new password. I also recommend activating the 2-step authenticator for your account

Someone used my debit card through my account without my knowledge or consent

Hello Storm Tyzzer!

Thanks for reaching out to Xbox forums support.

I'm sorry to hear that someone changed your gamertag without your consent.

Below I'll provide you with the link to steps on how to change your Gamertag. You'll have to pay a fee since it's not the

the first time changing it.

How to change your Xbox Gamertag

I hope this helps!

Felix

Xbox forums support

Maybe the issue might be with Xbox. Call costumer support and ask them how to completely unlink the old account and then link a new one. https://support.xbox.com/en-US/contact-us/ if not, someone else will know what to do. Good luck!