Thanks everyone. Sunstate/QFlink were brilliant about the whole thing and have offered another interview slot (being an airline, naturally they understand these things happen). Unfortunately I have yet to win lotto so am stuck with booking cheap seats for any interstate airline interviews I'm lucky enough to be invited to. Down side is losing out in these sorts of situations - not only losing a day's pay but having to raid the piggy bank to pay for more flights after forfeiting my return QF non refundable, non changeable flight. Heavy sigh.