(((Jbug))) you have reminded me of something I used to post more often here at PC.
Everyone needs to discuss such with their Ts, imo. If your T allows you to call and leave messages, with expectation of replies, then the T needs to tell you what his/her average reply time is. My pain psych always responds within the hour (usually within 5 minutes outside of office hours.) IF the T doesn't respond within that time period, then you need a plan as to what to do at that time. Mine says to call again, as the call/message may have been dropped by the service due to a technology glitch, etc.
I'm glad you are feeling better, jbug, about this situation, and I'm sorry that you went through the situation.