To end recurring payments, you will need to navigate to the platform you originally purchased your subscription from. If you have subscribed via the Apple App store, that is where you will have to cancel your subscription from. Once cancelled, you will lose access to the associated content at the end of your billing period.
Website sign ups: from the My Account Billing page, hit Cancel for that subscription or payment plan.
Apple App Store Customers: https://clean.email/how-to-cancel-apple-subscriptions
Google Play Customers: https://support.google.com/googleplay/answer/7018481?hl=en&co=GENIE.PlatformAndroid