You were promised a phone on launch day? You ordered on 9/9 (like I did), and they actually told you that you would receive your Black/Jet Black (I forget which) phone on the 19th? I'm just making sure this is something you were actually TOLD, versus something you inferred from "preordering on Day 1".
When I ordered, they told me on the phone that shipping dates for the Black 128 GB Plus had already slipped to October. They said my wife's Rose Gold would be received on launch day (it was), but that mine may take a couple of weeks, depending upon Apple's shipments.
Weird.
The reps tell all kind of weird s**t. When I called to place my order, my rep told me that I will definitely get it on launch day. I knew from experience that isn't happening because I called much later after the pre-orders started. After we confirmed the order, she told me that "system is now telling me your delivery date is 9/27 - 10/10". Yea, right! I would have been pretty pissed too had I not know T-Mo or carriers in general any better.