Airtel Apple tv free sub cancellation

It won’t let me since it’s not linked to Apple account.

Then I don’t think that this complimentary subscription is active. I am not aware of the possibility for access to Apple TV subscription content without an Apple Account.

But please check with the Apple Support staff for a definitive answer. Contact Apple for support and service (phone numbers) or start your support request online (chat/​email/​callback).

A complimentary Apple TV subscription would get linked to your Apple Account when redeeming. Then you can cancel it like any other subscription through Apple, e.g. on your iPhone in Settings﹥[You/Your Apple Account]﹥Subscriptions﹥Apple TV﹥Cancel﹥Confirm.

If you want to cancel a subscription from Apple - Apple Support