Flipkart — Content not present in the package

I had ordered 12 notebooks of classmate and in my Flipkart order section it is showing that both 12 notebooks is delivered but in the package that I received only six copies are there so what to do
Also box weight on box is written as 5.49 kg and when I weigh up its real weight is 2.7 kg
All Flipkart tape is broken and white tape is used to seal it

Seller name- Tech connect retail Pvt Ltd
Date[protected]

Shipping address- Yuvraj Kumar Niwaru army station gate jaipur 302012
E kart logistics

Message that I received from Flipkart

Delivered: Cello Butterflow Blue ...+2 more items from flipkart.com was delivered by Lokesh Dhakar. Click to give feedback

Out for Delivery: Cello Butterflow Blue ...+2 more items with tracking ID FMPP[protected] from flipkart.com, will be delivered today by an EKART Wish Master (call [protected], PIN 102). To know about safety measures taken to ensure a safe delivery of your order, click here
Order id- OD[protected]

I have a trust on Flipkart don't break it