Ye that’s the same thing my lawyer told my wife and It’s been over 2months now but not yet 3 months I sent them the additional documents requested but silence is what I get from them.. My lawyer said he’s gonna send them an email after this week.Hi!
When AVO request for additional documents, they don't stick to thirty days, from experience of others, they get back around 90 days.
Also, cos of the peculiarities of your application, they would want to give it more scrutiny.
You can apply for GCMS, it might allay your fears.
However, all would be well.