Ok 2 things (I have work experience at Apple Retail)
1) you do not need the original box. That is nonsense and discretionary. People return stuff without the box all the time.
2) You really aren’t going to like this one - they CAN’T make an exception and let you return past 14 days on a phone that was purchased through a carrier offer. Its impossible. There is no override button. Because the offer came from a carrier, it’s a binding contract with the carrier (not with Apple) and therefore cannot be overridden. Sounds like you didn’t get that far or when they found out their error they used the box thing as an excuse.
The best thing you can do is go to a physical store be wildly pleasant and calm. Explain the situation to a manager, “lead” or to a sales associate known as a “Pro.” Let them work through it and try to accommodate you. Understand there are impossibilities (they can’t return it and they can’t override the trade in value or “apply to existing purchase” button). They CAN give you things (although not a phone or cash).
The best case scenario is if you plan on buying something else (a non-iPhone) you should be able to convince them to give you $830 off that item (if it’s over $830). Unfortunately there are no override buttons to push when it comes to phones.
You beat me to the reply! In essence:
1)Go back to Verizon and be calm and professional yet firm about your predicament with the Store Manager. Be clear. Be factual. Do not get emotional.
2)If #1 doesn't get anywhere, ask for the Verizon Regional Manager's name and phone number.
3)If Verizon will not help you with #2, then Google the CEO, CFO, CMO, and other high ranking officials at Verizon and get their email address and write them all a calm, factual, professional, and THOROUGH single email about your experience and WHAT YOU WANT or feel you are owed as a customer. Reference Store locations, Mangers and employees you talked to, dates of your visits/conversations, include a photo of your sales receipt, etc. Also email the Public Relations or Press person. The subject line should read "Presidential Complaint" which will require a reply from a public company such as Verizon. DO NOT THREATEN them that you are going to Twitter or some other platform to complain (you can always go on Twitter at the very, very, very end if you are not happy).
4)If after all this work you do not get satisfaction (this may take weeks of work), then cut your losses and either swallow your bad deal and move on with life OR sell the iPhone(s) on eBay or to a friend or whatever. Bear in mind that even then you may not get a good price, will still take work to sell, will take work to go get a new phone and phone #, etc. and think about how much all this work is worth to you both monetarily and stress wise. You should also write a very clear and thorough complaint with the Better Business Bureau even if you think it's a waste of time or the complaint seems to go to a black hole.
I wish you the best in this quest for customer service!