I can relate a bit to where your tdoc's mind may have been. As a teacher, I often arrange to come early to school or stay late to tutor students. They make an appointment with me, they had better show up on time. Otherwise, I'm going to move on to other things I need to do. If they come late, I'm probably not in my room because I've headed to the faculty center to do other work or I've left to go home. They've lost their chance that day for my tutoring. I've moved on to other things. They'll just need to arrange another time to get with me. It may sound cold-hearted, but I can use that time constructively to do other things. She probably didn't get back to you right away for the same reason, she had moved on to other work she had to do.

If 8:00 AM is the only time you can get there, you are going to have to find a way to get up on time. That's just the reality. Those are her rules. That doesn't mean you don't deserve a therapist at all. You do. We all do. But they are running a business. We have to remember that.