You can cancel via the iCloud/Play Store account
For iOS users:Login to the icloud account > subscriptions > active subscriptions > edit subscriptions > cancel.
For Android users: Log in to the Google Play Store account > three lines on the top left corner > subscriptions > active subscriptions > cancel.
Once this is complete, the subscription will stay active until the end of the pay cycle and will not auto-renew.
All subscriptions are non-refundable and we are not able to provide any refunds for In-app Purchases.