The virtue-signaling corporate juggernaut that is Amazon sometimes acts in a very anti-consumer manner.
For example, trying to request that a missing Amazon order package be re-shipped since it was never delivered, contrary to what Amazon reports, is made rather difficult by the giant online retailer. Especially since they no longer provide a url link on their web site to address the non-delivery issue when Amazon reports the package as being delivered.
Instead, try the below method to get that replacement package sent, per this web page.
What to Do When Your Amazon Order Shows as Delivered but is Actually Missing
UPDATE AS OF NOVEMBER 2019! As of November 2019 here is what you have to do if your order shows as delivered but never arrived: Call Amazon at 888-280-4331 You will be asked to let Amazon verify your account by having Amazon text the number they have associated with your account (while you are on the phone) and once you have verified it, the automated system will guide you through some options, one of which is “about an order”, followed by “are you calling about an item?” Answer ‘yes’ to this, and then the system asks you about the item, and gives you the option to say that it never arrived. At this point the system will offer you a refund or a replacement.
You can also try using the Amazon Customer Service Chatbot if you prefer not to use the phone, although we have not tested it recently.