Who I have the same questioned this topic

i just got my 2 iphone 13's in,

Activated fine.  Switched from ATT.

Was told at time of purchase (on phone with verizon) that i would get $1000 each phone trade in + up to $500 (the current iphone promotion).

Received the phones today with no instructions for trade in, never got any trade in emails.  How am i supposed to know what to do with the old phones ?