We are sorry you had to experience this. We request you to reach out to us within 48 hours of the order / shipment delivery being reported so that we can investigate the matter.
You can cancel your order from the ‘Order details’ screen before it is out for delivery.
You can do so by clicking on the Account icon on the bottom of the App Home page > select “Orders” > Select the order > Click on “view details” for the shipment which you want to cancel > tap “Cancel”