How to practise Zazen so that it leads to Satori? Currently I practise Zazen as I have read from books i.e 'Just sitting doing nothing'. I keep an erect sitting posture, back straight and eyes closed.
This hasen't led me anywhere.

So I am asking the official way to practise Zazen and Zen in general so as to lead one to Stori.
Yes it has.  You just don't know where it's led you.  Keep at it and you'll find your way out of the bag eventually.

(Official answer - get a teacher.  You can't practice Zen by yourself.)