He was busy with 'something'... Nothing you can do...
Well, I spoze you could threaten him with changing your squawk to 7700,
which will set off bells, and cause a review of the tape by the
supervisor... That might get him to answer...
OTOH, I suggest what you did was just fine... Announce your intentions
clearly so it is understandable on the tape, and then just do it! You
are PIC, remember?

denny