Ordered iPhone 15 Pro Max and Received an Empty Box

I decided to trade up my wife and I's devices.  So we ordered an iPhone 15 Pro and and iPhone 15 Pro Max at the same time with the same order number.  We received notification of two different tracking numbers and two different shipments.  They both arrived today and hers (iPhone 15 Pro) was in the box, albeit the box was beat all to pieces and the phone nearly fell out of the it, but the phone was there. 

The other box, my phone (iPhone 15 Pro Max) much lighter.  Box was not tampered with and tape looked single use, not opened and re-taped. Opened it just for the off-chance anything would be there to explain, and found, like many others, order confirmation w/packing list, return materials for the phone I am trading in, and activations instructions.  No phone though.

I am writing this so ATT/Apple is aware this is still occurring.  From the appearance of things, it would seem whoever was packaging this at ATT/Apple just never put the new phone in the box.  I will attempt to contact customer service tomorrow, but this is extremely frustrating.  I would love to know the process at ATT to rectify the situation, ensuring I do not pay tax twice and can have a new phone sent to me ASAP.  

Please advise.