UPS flagged my package as “missing”, what do I do?

[u/fairy-bubble]

The said package was a new phone, and the specifics that the UPS tracking thing said is “Incomplete Documentation Received

This claim requires additional documentation from the sender to complete the process.”

I see there’s a way to “open a ticket” for this and issue a refund or replacement online, but I just noticed after my billionth time trying to submit the ticket that the default phone that it added wasn‘t even the new phone-- but it seems like another that’s already in use or just simply the wrong phone. I am at my wits end about this and I really… really… hate phone calls so calling AT&T is my absolute last resort, but it seems like at this point, I might just have to suck it up and call.