Unable to cancel subscription that automatically renewed without my knowledge

The only way to do this would be if you talk to Xbox Support.

I tried doing that this morning which redirected me to the community support page

So you're saying if i don't cancel my subscription in time there is no way to cancel anymore and you're going to steal those 9.99 for a product which I can't use?

To cancel and stop renewal charges for any Xbox subscription, such as an Xbox Live Gold subscription, an Xbox Game Pass, or EA Access, you need to do so online.

Important

• You can’t cancel an Xbox subscription if it’s past due or suspended. You must pay the past-due balance before you can cancel or turn off auto renewal. For more info, see Update
  payment info to continue your Xbox subscription or How to pay a past due balance on an Xbox subscription
• If you have a prepaid subscription, you won’t see the Cancel or Remove option next to your Xbox subscription because prepaid subscriptions automatically expire and you aren’t billed.

How to cancel your Xbox subscription online

You can cancel your Xbox subscription either immediately or by stopping automatic renewal. If you cancel immediately, you’ll also lose access to the subscription service at the same time. If you stop automatically renewing your subscription, you can continue
to use the service until it expires.

To cancel your Xbox subscription immediately, go to Cancel or turn off recurring billing for a
Microsoft subscription and follow the steps under Cancel.

To stop automatically renewing your subscription, go to Cancel or turn off recurring billing for
a Microsoft subscription and follow the steps under Turn off recurring billing.

Need additional help canceling your Xbox subscription?

If you're having problems canceling your Xbox subscription, review the following info before contacting support.

I already canceled my Xbox subscription, but I was still charged for it

If you were charged after you canceled your Xbox subscription, this likely indicates you had a pending balance for the current subscription time when you turned off auto renewal. If you canceled the subscription, you won't be charged again.

I don't see any option to cancel my Xbox subscription when I sign in.

If you sign in to your Microsoft account and see an option to Renew but not to Cancel, you've already turned off auto renewal and won't receive additional charges.

I don't see any Xbox subscriptions when I sign in, but I still have a charge for an Xbox subscription.

If you don't see any subscriptions listed when you sign in to your account, make sure that you're signed in to the correct Microsoft account. If you're not sure what Microsoft account you're using for your Xbox subscription, use the Lost
Account Solution or the Lost Password Solution

You would have to try contacting support and speak to billing. http://support.xbox.com/contact-us