We are on the same boat as you are. No one can tell you about your Grant date. But your medical formalities will get processed and reflect in your immi account by two weeks. You can track it from ImmiAccount > Health Assessment.
I hope it comes super soon... Can't wait for it..
They have elections in this weekend, I believe files get processed and they don't keep their work on hold.
No CO contact till now...
It was 7 to 9 months earlier(4 months back), then became unavailable, then again it became 8 to 12 months(2 months back).
Recently they again updated it to Unavailable. We are also clueless about it.
When did you applied??
You can make a new immi account and import your application. Just need to mention Reference No, Passport No and you are ready to go track your application by yourself.