Minimum term service contract fee

I'm highly confused.  I have had Verizon service for several years now.

In November I bought the new iPhone 13.  I traded in my old phone.  Both the old phone and this one were purchased outright - no financing or anything.

On this month's bill, out of the blue, I had two "Minimum term service contract" line items - one for a partial-month charge of 16.67 and one for 20.00.

Additionally, my trade-in credit isn't applied to the bill, despite an automated email from Verizon last month saying that it would be applied this month.

I'm confused.  Please help?