I'm so sorry this is happening. That's really unprofessional and rude. Being late is one thing, but not apologizing and not making up the time is really bad. I think you should tell her how this made you feel. My T is almost always late, but she always makes up the time and sometimes even goes over. If I got shorted on time, I would be angry and hurt too. You should get a full session, and if you don't, you shouldn't have to pay the full fee. Again, I really think you should talk to your T about this.