Verizon Wireless Stole My Phone AND Obligated Me for 3 YEARS! Garner NC

This year I tried to do it and found out that I owe $599 on a phone that was supposedly paid for. I had a previously paid-for S20 that I traded in for a new S21, It was initiated when I was sent a text that said they would give me $800 credit toward a new S21 and all I had to do was to pay $200. I run a car dealership, so I am used to people trading in things, and when we give them a value for their car and they pay the difference, the new car belongs to them. This year I tried to do the same thing only to find out that I actually owe them the money that they supposedly gave me for the old phone. In other words, they didn't really give me anything for the phone, because if I had stopped my service or tried to trade the new phone, I had to pay then the $800 that they supposedly gave me for my phone. That is stealing in my book. Now almost a year later, I still owe them $599 for the phone that I thought I owned outright. So basically what happened is that they took $200 from me, took my phone, and hung me over a barrel for 3 years. This is such a total rip-off. I would never have agreed to that. Then I called in to discuss my surprise and was told by an agent that I have been with the company for 16 years and she would help me. After being on hold for a while, I was told that I could go to a store and upgrade and there would be no balance on my current phone. I looked up my account and saw a balance still on it, but she assured me that when I got to the store I would be served right away and they would see the notes on my account. I then called the store and they pretty much laughed at me, I then called customer service and was told there were no notes and that Verizon did me a favor because they gave me more than my phone was worth. I personally feel that it was worth more than nothing! What I actually exchanged my phone for was a 3-year obligation. Thanks a lot. They already have the most expensive service in the business, and they rip their customers off, THANKS