Amazon orders with a “Pending” status cannot be canceled. Once the payment method of the buyer has been properly verified, the cancellation option will become available to the seller. Amazon states that orders can stay “Pending” for up to 21 days.
To cancel an order follow these simple steps;
Get in touch with Amazon Seller Support.
Give the representative the specific Order ID or IDs.
Supply the ASIN for the order(s) as well as the quantity of items in each ASIN.
Provide the appropriate reason for canceling the order.
The Amazon Seller Support agent will supply the seller with cancellation confirmation and send you an email notifying you of the cancelation.
If the seller cancels an order by mistake, it cannot be restored. The seller can let you know of the mistake and if you’re still interested, you can place the order again.