Visiter sub class 600

Hi my visa status is forward to Australia high commission islamabad on 2/December /2016. I got invation letter on 06/December/2016. It's long time but I don't receive other email please help me how I find about my visa
I need your help please my visa is refuse what should I do now
Hey even I had applied for visitor visa for 3 months.can you pls tell me how long did it takes ? Or when did you get it ?