Roku channel - How do I unsubscribe/cancel a subscription?

Since you subscribed via the seller's Roku Channel, you will need to manually cancel in Roku settings, as instructed here: https://support.roku.com/article/208756478-how-do-i-manage-or-cancel-a-subscription

Note: We are not able to cancel this Roku subscription for you. You will need to do it from your device manually.