Talking Therapies - appointment cancelled with 40 mins notice

Feeling P'd off that my scheduled Talking Therapies appointment was cancelled this morning with 40 (well 43 to be exact) mins notice

You have to wait (6 wks) for a slot so have it in you mind it will happen. 

I have alerts on my phone on Silent, so I don't react to every ping (also no social media on there for same reason) and missed the cancellation text, so with 5 mins to go , at my PC logged in, and then noticed a msg on my phone, cancellation.  arghh

Understand it could be for good reason - like Therapist is sick or more urgent priorities - I'm not at risk.  Non-the-less annoyed, although hopefully next appointment will go ahead.

Sorry having a mini-vent.  I'll move on, in a minute.