I don’t know what kind of calls these are. I had a job once involving making calls and taking calls. They didn’t provide training on how to do this or how to handle difficult people.

I bought the book Customer Service for Dummies, which was really helpful.

As far as asking for help or an accommodation, I have no experience with that part. Maybe someone else will chime in.

I really do think you should call your therapist on your question too.