Copa,
You did NOTHING wrong here.
It’s not like you said this to the guy that was fixing your car—this was to a person you were paying lots of $$ to help you deal with the very trauma and anxiety that you expressed in the email.
Is this the way they treat people under their care? And, yes, the practitioner is responsible for the actions of his employees who answer emails on his behalf. That this is his spouse makes him even more culpable.
I am interested to hear what the forthcoming reply will entail. If it is anything less than him taking 100% of the responsibility and apologizing profusely, while offering to make amends in some way, I would be extremely skeptical of him and his business.
I probably still wouldn’t go, but it would be a nice gesture.
Have you considered going to the hotel anyway, with M or a friend? Just enjoying the city and going to events or museums or restaurants?