Find a new supplier and as them to not use the post office, but UPS or Fedex!
I used to be a fan of FedEx. That was back in the ‘80s/‘90s. Since then... they’ve fallen to the lowest of the low in my opinion.... because when I moved to the “country” (40 miles from the nearest ”metro” area).... they are
absolutely horrible!
They used ”contractors” in rural delivery...sometimes driving FedEx vehicles...sometimes their own without markings... but they don’t use “Google Map” they use FedEx mapping which does not show backroads or correct addresses.
I’ve found packages tossed over-the-fence a half-mile away, ... delivered to wrong addresses, empty barns, .. I even had negotiable instruments tossed onto the roadside BENEATH mailbox-groups... I‘ve paid for “insurance” and they’ve claimed to delivery expensive parts... When I use their own website facility to “show proof of delivery” all they do is state “Driver assures delivery” and that was the end of the claim process.
I”ve paid extra for “Saturday” delivery.... only to find they won’t deliver in rural areas on Saturday... and will not refund the extra charge. (Apparently I should have known they don’t make rural deliveries when they offered it for an extra charge.)
NEVER USE FEDEX. UPSPS and UPS has no problem coming straight to my door and making delivery. Amazon is also highly reliable. (They even email me a picture of the package sitting on my doorstep.). But FedEx is a crap-shoot and makes proper delivery less than 30% of the time.