In case you want to cancel items that aren't dispatched yet, go to 'Your Orders' and select the product you wish to cancel. Click on 'Cancel items' after that; this will immediately cancel your order will instantly initiate a refund will be initiated to your original payment method, in case the order was prepaid.In case your order has been dispatched already- click on the 'Request cancellation' option, and your product would be cancelled for delivery. However, if the delivery guy still reaches you, you can refuse delivery.In case, your order has been shipped by the seller directly and not by Amazon, you have to contact the seller to request cancellation. In case your order has been delivered already, consider returning the same.