When I had a case manager she wanted to talk to my T and I had to have releases from both sides the case manager and the therapist so that they could talk. It took a while and my T wasn't keen on doing it but eventually they talked and my T told me what they talked about, though not in detail. It did take a while though. I'm sorry your old T didn't follow through when she said she would. Maybe something came up? Still, she should have kept her word or reached out to new T to set a new time to talk.