Due to Covid-19, USPS has been seeing a huge increase in packages which has caused delays recently with deliveries. I would recommend waiting a few more days for it to arrive and if still nothing, a missing mail claim will have to be started.
Here is a link to the claim page
https://www.usps.com/help/missing-mail.htm
Once the package is picked up from USPS we are no longer in control. The claim would be the best option in retrieving your package.
Before placing an order please understand, We are NOT responsible for any lost packages due to USPS, all refunds for lost product will have to be taken care of through the USPS.