Xbox Game Pass subscription cancellation

Here's a good link to how to do so:

How to cancel an Xbox Game Pass subscription on Xbox One

• How do I cancel Game Pass?
  
  See How to cancel your Xbox subscription for details.
  

Hello Vincent,

We thank you for bringing this inquiry to our forums community, and understand that this concerns your Xbox Live membership being cancelled after cancelling your subscription to Xbox Game Pass.

We would like to confirm that the subscription offered for $1 was not
Xbox Game Pass Ultimate which offers both Xbox Live and Xbox Game Pass which would therefore convert
your Xbox Live membership of 4 months into Xbox Game Pass Ultimate. If this was the subscription that you purchased, cancelling it would have cancelled the entirety of the subscription left.

Confirm this for us and we'll be right here to help.

Best wishes!

I tried canceling my game pass sub. On Xbox but it said I had to do it on line so I canceled my game pass and gold subscription but my game pass sub. Keeps auto uncanceling

You would be best placed to create your own thread.

If you are referring to losing Xbox Live Gold because you cancelled Game Pass Ultimate, there is nothing that can be done. It clearly states that Xbox Live Gold will be converted to Game Pass Ultimate days and can not be reverted and that canceling Game
Pass Ultimate will cancel out the converted Xbox Live Gold. https://support.xbox.com/en-US/billing/xbox-subscriptions/xbox-game-pass-ultimate-faq

You can cancel your Game Pass Ultimate membership at any time, and you will
continue to have access to your Ultimate benefits until your prepaid time ends, at which point you will not be charged again.

Note The upgrade of any prepaid time to Xbox Game Pass Ultimate cannot be reverted back to Xbox Live Gold or Xbox Game Pass, and you cannot receive a refund for Xbox Live Gold or Xbox Game
Pass. You can, however, rejoin Xbox Live Gold or Xbox Game Pass when your Xbox Game Pass Ultimate subscription ends