It is my understanding that OP did not get a clear explanation (not to be confused with detailed) from her t as to why he would no longer work with her. I thought she found out t stopped practicing after receiving the letter. And I don't think, "I have nothing more to give" is a clear explanation as it still leaves the door open for wondering, "Why? What did I do wrong?" It all sounds morally reprehensible to me.

Perhaps fighting for what OP wants to fight for is part of her process to letting go. She is advocating for her self and that is a powerful and healing tool in and of itself. Maybe it is unlikely she will get what she is asking for, maybe it isn't. We don't know. I give you, MariaLucy, credit for taking a stand and having the courage to ask for what it is you need. Please keep us posted on how things progress, if you like.