I know that you feel right now that T doesn't care about you. That is one interpretation, and it's okay to feel that way, but it's not the only possible truth. You said before that she is amazing and trying to foster trust and attachment, so there are some signs that she cares about you too. In her phone call you felt you needed something very specific, and she didn't realise exactly what you wanted, or goofed up because she was having a terrible day. Maybe she thought that the goal thing would help you feel better, but she got it wrong because she's not a mind-reader.

The schedule thing was probably a plain old mistake - no halfway competent T would just cancel a patient's appointments without talking to them first.

I really hope that you will go on Monday and talk this through with her, and tell her what you've been saying to us. You deserve support