Thanks a lot for the clarification.
When I applied the first time in January 16, I attached document alternative to birth certificate, but unfortunately they returned my application with money due to this issue and in the email they only mentioned that my I need to apply again with a birth certificate
According to this I have the following questions:
1) does it mean that all other documents I attached are good to go again? yes all good.
2) when I submit again with birth certificate attached, will they count the 4 months wait or no restart again? (They mentioned that a copy of this application will no be retained) Everything will be started from scratch. That time will not count.
3) my study visa expired last month is it an issue, to reapply with it, or I need to renew it? You need to keep your status legal and valid while your application for permanent is processed.
4) the photo I attached date taken is longer than 6 months, will it be a big problem if I attach it?
If it is more than 6 months old , you should get new one again.
Thanks a lot for your time and clarification.