Indigo Airlines — Taking extra cash for baggage

Address: Kolkata, West Bengal, 700053

Dear Sir/Ma'am,

I would like to bring to your notice that I was travelling from Kolkata to Pune on the 24th of April 2017 by flight 6E 202.
I was carrying a laptop bag, one checkin and one hand baggage. For the first time in my experience of flying so many times. My laptop bag was weighed. And because I have a heavy laptop I was asked to check in my other hand baggage and pay extra money for the overweight check in.
Never in my entire experience has laptop weight been counted as hang luggage whether it's domestic or international flights.
Even indigo for that matter my past experiences assured me that laptop bag doesn't count. But unfortunately the female at the desk wouldn't agree and took the extra money from me and also did not have the decency to address the problem in a normal manner. Was rude and didn't want to listen. And not only that she got me waiting for a good 20 mins and got me extremely late for my flight.
As I tried to understand a new rule as she implemented the security guy at the counter told me why do you have an extra payment of 5 kgs? When you could have carried it in your hand ? I told him because apparently laptop is weighed. And to quote him ' call customer care laptop weight never counts'
So I write here to ask you this question is money making on extra baggage so important that you make your customer go through a bad experience before they even get on the flight?
Highly disappointed with the service today. Hoping for a response.

Warm regards