Achievements unlocking for a game I do not own

I was happily playing Red Dead Redemption 2 online when a constant flurry of achievements for Killer Instinct started to unlock

I don't have the game

I never had the game

My profile has never left my home Xbox One in any form

Chat support basically tell me that the only way it is possible is that I've set my profile as home on another Xbox One console (which I have already said has never happened)

The achievements are unlocked, on my profile and I am told there is no way to remove them

This is ridiculous

Can nothing be done about this?, really?

I've seen a few people report this recently to Xbox support on Twitter.

Seems you aren't the only one.

Change your password and see if ir stops

Please see my post above

Nobody touches my xbox but me and I don't put my profile anywhere other than my Xbox One in my house and my laptop in my house

Devices connected to my account confirm the two above and show nothing additional

The game registers zero time played under stats

The achievements are random and don't make sense

Microsoft have done this

Would it be likely that someone has your account on his xbox and plays the game. Go to your microsoft account and check the devices connected to the xbox account.

https://account.microsoft.com/?ref=MeControl