Trade in bill credits CANCELLED?

I had similar issues that are ongoing. It doesn't help that they upscale on every call. I was originally told I was eligible for $500 trade in credit on iPhone 7. Every call the reps try to upsell . Rep talked me into buy get one free iPhone 12 even though my wife was fine with her old phone. The rep never told me I couldn't still trade in my old phone if I agreed to promotion. I even asked them several times after that I would be getting 24 bill credits for $500 total. The tool my trade in and said it was worth $0. I even questioned them and they said don't worry you will get bill credits. They are bold face liars. Shame on you T-mobile I will have to take you to court.