I am confused by Apple docs about CANCEL notification_type https://developer.apple.com/documentation/appstoreservernotifications/notification_type.
They state
CANCEL
Indicates that either Apple customer support canceled the subscription or the user upgraded their subscription. (...) and
Handle Use Cases for Notification Events: Subscription is active; user upgraded to another SKU ---> CANCEL, DIDCHANGERENEWALSTATUS, INTERACTIVERENEWAL
AppleCare refunded a subscription ---> CANCEL, DIDCHANGERENEWAL_STATUS How would I know whether notification is coming after Apple cancels/refunds subscription or user upgrades subscription?