people, dont stress! seriously! theres no need to panic. i was able to attend ANY of the european shows that i wanted to go (3 dublin, 2 london...which should be hardest to get tickets for) and i got them all; even though i missed out on the presales.
there will DEFINETLY be an amount of tickets released on ticketmaster in the coming weeks and months. if you keep trying you will 100% get your ticket!
dont give up, NO show is "sold out"! Thats a fact!
good luck and enjoy the boys down under. id love to see them again...