Hmm, well, I had a reply to my email

Thank you for this informative and helpful email.
I would like to take some time to consider the issues that you’ve raised, since they are so important. I shall get back to you over the weekend.

Not really sure what to make of that but I'll find out soon enough. I spoke to someone from the psychiatry service this morning

and she recommended that I don't make any decisions about continuing or not until I have had a chance to discuss the issues with the therapist (preferably in person).
So, I guess for now I just have to wait and see if there is a way forward with this therapist...