Welcome to TinyDeal,
If your order is still pending, you can cancel it by yourself in your order history.
My account--my order--order no.-- view details-- Cancel this pending order.
If your order is processing, please contact us as soon as possible. We will help you cancel it if the order hasn't been shipped yet.
But if your order has already been shipped out, we are unable to help you cancel it at all. When it comes to you, you don't sign it. It may be returned to us. But please tell us for that. If we can get it back, we will inform you via email and resend or refund for the case.
Hope your understanding.
Any questions please contact us by Customer Service Express: http://help.tinydeal.com/contact-us