FOR iOS USERS:
To cancel your subscription on iOS, here are detailed instructions on how to change or cancel a subscription yourself in iTunes:
If you are unable to change or cancel your subscription, please contact an Apple support:
FOR ANDROID USERS:
To cancel your subscription on Androd, please visit this link:
If you are unable to cancel your subscription yourself or if Google Play is unable to assist you, please contact Episode Support and provide the GPA order number or a screenshot of your subscription purchase receipt.
See also: How Do I Get A Refund?