I would be having a one way conversation with them by now.
Such is the way of many now...
How do you know it wasn't a student on their first solo XCC, got a bit lost, panicking etc? In which case it really wouldn't help to start the call with accusations and a generally destructive tone.
It probably was some d**k who didn't care where they were, but flying's the wrong game to be making assumptions in. Need facts.