I just checked and found that we will not be able to get the $400 credit, but I can raise an escalation for $200 credit as iPhone 5S is a lower tier device for a trade in
The iPhone 5S was specified as a qualified trade in. https://www.msn.com/en-us/news/technology/verizons-thanksgiving-deal-offers-400-if-you-trade-in-and-...
"On Thanksgiving Day, the carrier is giving $400 off the purchase of a new iPhone when you upgrade and trade in an older phone. Phones eligible for the $400 discount include the iPhone 5S . . ." I know, I checked before I bought.
Help Verizon customer service fairies . . .