Grant delay very long processing time

I have applied my PR skill 189 last yr 5th Feb along with medical n PCC for myself n spouse. Our PCC being expired this Feb 2017, we were asked to submit new one. Which i submitted on Mar 22, and over a month now I am eagerly waiting for visa grant. Could anyone pl help despite writing a mail.
There are many people who are waiting for 12+ months, and they may request to re-submit your PCC or medicals, this is again a normal procedure. We have seen cases waiting for over 18 months.