Are you talking about MEL? There are only so many counters you can visit without the staff recognising you. In any case, your success record is admirable.
MEL didn't prove too bad but still ended up shelling out $450 to get back to SYD after no-showing. Started off in Domestic Business Lounge (incredibly rude), then Customer Service counter past security (slightly nicer but unwilling to accommodate) followed by Ticketing counter outside security (very nice lady took pity and moved me to next day's flight).