I would contact them again because thats the wrong information about how the promotion works. what's weird is that I just went to At&t website and the promotion info has been taken down! unless I'm just blind lol
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Nvm, it is still there.
"Get iPhone 7 for $0 when you trade in an eligible iPhone*
when you buy on AT&T Next

with qual. svc. (min. $50/mo.) iPhone 7 32GB free after $650 in monthly bill credits. Tax due at sale.
*Ltd-time offer (ends 9/30/16 in PR). Priced $650. Req’s well-qual. credit and 0% APR 30-mo. $21.67/mo. agmt. Up to 3 mos. due before credits start.
If svc. canceled, device balance is due. Activ., other charges & restr. apply. Void in CT, RI & Miami-Dade.
See offer details"
As you can see it says "Monthly bill credits". So it is not a gift card! it'd be nice though because I could just go ahead and pay off the phone and use the $650 credit! sadly thats not how it works. Credit will be spread between the 24 or 30 month installment plan.