I'm sorry you're going through this. And I agree that the T who gave you the assignment, then two weeks later cancelled your appointment was rather cruel. Have you only tried looking for T's through Psychology Today? I'm just thinking that some might not list in there. Try just searching online for, say, "therapist" and your state or city. Some T's have websites where they might describe themselves, the types of issues they work with, etc. Or as someone else suggested, if there is some sort of LGBT advocacy group in your area, see if they have a list. Or even national groups might have some sort of directory online?
At this point, it almost seems like it would be better to just have *someone* to talk to, even if they're not quite the right fit. (Obviously not someone super religious or dismissive). Good luck.