I have frequently ignored calls from aircraft (and co-ordination attempts from other ATCOs) intentionally because I was dealing with something else that, at that time, was a priority.
Good for you.
This erse (he wasn't Irish but I need to get around the autocensor) actually admitted that he wasn't even listening when he subsequently made an arse (dunno how I got away with that one!) of himself by bitching that he wasn't told.