Mail scenic delivery

I ordered a custom tumbler from a vendor called 64hydro on Dec. 4th (Christmas gift). It was reportedly shipped via DHL. Evidently DHL turns some deliveries over to USPS. USPS showed tracking number not found in their system. I emailed customer service @ 64hydro 3 times before I got a reply. I don't know if the item was found or remade. Again their email showed shipped via DHL. USPS delivered it here on Jan. 12th.