Who I have the same questioned this topic

My husband and purchased iphone 11 Pro's online from Verizon on Black Friday 2019 and were advised over the phone that we would each get $400 back on monthly credits over 24 months.  Part of the promotion was trading in our iphone 7's, which we sent in.  Now we are told that the promotion only applied to new customers.  This is a scam!  We talked to a Verizon representative over the phone before purchasing the phone to ensure we qualified and he insisted we did.  We are on an unlimited plan, which I also understand is a condition of the promotion.  We are very disappointed and thinking of leaving Verizon!  Anyone else having issues getting the money back?