Deleting the Stage Access app from your device does not cancel your subscription. You still need to cancel your subscription, even if you have deleted the app.
If you subscribed through the Stage Access website, log in to your account from a web browser and go to the Settings option and click Cancel Subscription.
If you subscribed through the iTunes App Store, the Google Play Store or the Roku Channel Store, sign in to your account there, go to Subscriptions, and cancel your subscription.
Remember to cancel before your next recurring billing date to avoid any upcoming charges. Once your credit card is charged for the next period, there are no refunds.