Somebody put my account as their home xbox and I can't switch it back

If they set it as their home xbox it doesn't matter if I change my password they're still using my account for free games, even then I've tried it

It would keep them from signing into your account and possible changing your information so you can no longer sign into your own account. Nobody else should have your login information. It's a violation of the code of conduct to share that information.

Like SMwutches said.

Also you should perhaps check in general all your connected devices.

Link: Microsoft-Konto | Geräte (account.microsoft.com/devices/)

And unlink all those unknown devices. Also sharing game library outside family is super bad and naive.

If they set it as their home xbox it doesn't matter if I change my password they're still using my account for free games, even then I've tried it

You would have to wait until your limit resets again. You should also change your password so they can no longer access your account.

So how else am I actually meant to put my home on somebody else’s account?