Bait and Switch - Trade in SCAM

I was upgrading my phones, checked on the app, it said my phone was worth $800. Went to the store the next day, showed them the screen, he said yep. Did the deal, signed for them taking my phones, or so I thought, when I was actually signed a contract to pay $31 extra month on my phones. They never said anything to me that to get the $800 I would have to add a line. Started calling within a couple of days when I had another issue about getting an Apple Watch that I was told was $199 and I would own the watch, he rang it up, nope $365. I said keep it. Called and found out I was only getting the $400 trade in value. Explained to that rep, he said I will fix it, it will take a few days, I will call you back, surprise no call and no change. Talked to a supervisor after a tower outage had me without service for over a week at my house. Got $50 credit and told my bill would be over $200, explained it again and she said that I would have to add a line, I said no one to add a line for, and explained to her the situation, she checked came back said my bill would be $113 for this month and $170 after my accessories were paid off, nothing about having to turn in a device or make monthly payments. Called another supervisor 2 weeks ago, told her everything and was told she would pull the calls and listen, she called me today to tell me she found the calls but since the rep told me about having to add a line there was nothing for me to do. I said tell me in there where she said I had monthly payments, she couldn't, I said did you hear her tell me at the end of the conversation that my bill was 113 for this month and after accessory payoff it would be 170? She danced around it. I told her well great I am stuck for 2 years, so congratulations you win, but I will NEVER. EVER give your company a positive review, don't even send me the survey and I hung up