Update 3/12: Now I AM Getting a Final Bill (allegedly)

I told you this story was probably not over. Now I received an email saying that my issue had been escalated to a "specialist" and that I would be receiving a copy of my final bill in the next 8-10 days. I am going to go out on a limb and say that, despite my previous communications, the final bill will not be $0. I'll also go out on a limb and say that I won't receive the bill anyway.