Unfortunately, the first step is to contact the carrier to request a "geolocation scan" so that they can try and track down the package for you. We have seen too many times that the carrier will scan items early, and then they show up a day or two later because they don't want to get into trouble for a delay on delivery.
After that has been completed, and truly shown as mis-delivered or lost by the carrier, please contact the seller of the product through our platform to provide the information from the carrier and to see about finalizing a resolution, such as a new shipment or refund. You can do this from your buyer account, or if you don't have one, you can create one with the email address you provided on the order.
If there are any issues after contacting the seller, such as a non-response, please reach back out again to us here at the marketplace, and we will work to resolve any ongoing concerns. Please be patient, and note that as a marketplace, we allow up to 3 business days for the seller to respond and come up with a solution.
If you purchased marketplace shipping insurance on the missing order, please reach out to us directly for a resolution.