Indigo Airlines — lapse in standard operating procedure (sop) leading to missing my flight

Address: New Delhi, Delhi, 110037

I had boarded ranchi for indore through delhi flight no. 6e 436 on 2nd january 2018 at 13:30 but i deboarded at delhi as almost all passenger were deboarding.

To begin with, i have been travelling transcontinental and national flights for over a decade but have never been in a flight that hops at airport (Delhi in this case) without deboarding all the passenger.
I admit i should have been more vigilant but the lapse in the standard operating protocol would have prevented this "traumatic experience"
1) i was not told at boarding pass that it will be the same flight that will continue and not to deboard (Sop).
2) it was never announced in the flight (Not at any time) that indore passenger was not supposed to deboard (Sop).
3) on landing, i switched on my phone and i got a message from indigo that boarding from delhi will be from gate 9b (I still have the message) (Correction in sop).
4) while deboarding, air hostess did not check any boarding pass for indore passenger (Sop).
5) on getting off from the apron bus at arrival, i showed my boarding pass at the indigo help desk at entry immediately on the right side, without looking at the boarding pass the guy directed me to towards the departure.
After waiting for around 5 min my baggage at the belt which of course did not get i again approach a different help desk and he asked me why did i deboard the flight and the flight had taken off (Which later i came to know it did not) (Gross negligence)
I was rescheduled for the same flight next day on additional payment after pleading for hours and got check in baggage after almost 4 hours. (Poorest customer service possible)
In short it was a nightmare!!