Subcap is not authorized to do anything about the cancellation of subscriptions.
To cancel the subscription:
For iOS: Go to your phone’s homepage, then go to Settings> Your Apple ID> Subscriptions and you see Subcap in the list, you can cancel the subscription from there.
For Android: Open the Google Play app. At the top right, tap the profile icon. Tap Payments & subscriptions and then Subscriptions and you see Subcap in the list. Tap Cancel subscription.