I don't suppose you are fluent in Irish? I believe that if when you ring their number and press the relevent button they tell you for Service in Irish you get a person very quickly! I had an issue I was trying to contact them for but couldn't get through, was told this but unfortunately I am not fluent in Irish.
That said I did eventually manage to get through to them one day within about 5 mins, hit and miss I'd say, first thing in the morning is not as successful as you would think, I got through at lunchtime which I would have thought would be worst time.