I trained and then instructed out of Cooly for almost three years and had nothing but the utmost respect for the (then) controllers.
Filing a report on the guy for a brief slip if indeed that's what it was seems a bit of an over-reaction to me. Far better sorted out over the phone like gentlemen.
Almost all students are crap at RT to start with and we all had to learn. It needs give and take on both sides.
And breathe......................................