Problem with Trade in credits

There was a promo for trade in iPhone 6 for an iphone 7 and get 650 in credits over two years. So I filled out the online form and did two iPhone 6's for two iphone 7's. I never heard anything so I found their web site to look up the valve and it said 145 for one iphone and 28.80 for the other and thats Crap! Both iphones were in perfect condition, no scratches or marks or cracks of any kind and they worked great still like new. So I can't figure what the deal is. I called them and they said that one had find my phone on which it did not! Then they had me talk to someone else and they said no find my phone isn't on its just not in what they call perfect shape which is also ridiculous. Then a third person told me no its fine but the phone is just locked, I told him that I reset it to factory and just says Hello and Hola and he said well your right it can't be locked then and to call back in a couple of days and maybe the warehouse will update the info. Att customer service told me to tell the att rebate center to send my phones back to me and they said they don't control that and can't and ask Att customer service to send the phones back to me. I just keep getting sent to different people and none have a clue with what's going on with my promo. I was true and honest and sent my phones to ATT and they are not being true and honest to me. I just couldn't believe that ATT would scam me! I have been a loyal customer since they bought out Cingular but now I just want my old phones back and to leave to any Company but this one!