Please note: Deleting the Sundance Now app from your device does not cancel your subscription. You must follow the cancel instructions below in order to stop being billed.

When you signed up for Sundance Now with your Amazon billing information to start a subscription on your Fire TV, you can only manage the subscription on the Amazon website. To cancel your Sundance Now subscription on Amazon.com:
  1. Go to https://www.amazon.com/appstoresubscriptions 
  2. Find the Sundance Now subscription and select 'Actions'
  3. Choose 'Edit payment information' -> 'View billing history' -> 'Cancel your subscription'
Still need help? Contact Amazon Support.