That CHIRP document makes scary reading.
On the cancelled SVFR clearance the pilot should have politely told ATC to stick the cancellation somewhere warm and dark. It is utterly ludicrous to cancel a clearance when airborne. I got that in Italy once (had a cleared route truncated, in effect) and had to fly a dogleg way out over the sea to get out of CAS.... but that was Italy where most ATCOs barely speak English and one is not well placed to argue. In the UK, this incident is appalling.
There is other more scary stuff in that report, like the airliner which descended to 2400ft (apparently knowing it was below the MSA) because they could not understand the (crappy) Indonesian ATC instructions.
Always keep decisionmaking in the cockpit.