bridging visa waiting time

Hey Guys

So I applied for my 820 subclass back in March and expected to be on the bridging visa for 12 months. Now I have recently checked and it is now saying 20-25 months. Is there anyway to speed up this process? Has anyone been to the embassy for a interview or does getting married speed this up? Any pointers or advice would be great, we just want to get the ball rolling on this and start applying for mortgages etc.

Thanks