Jet Airways: The woes of changing a ticket online (or offline, or any means)

aircraft in sunsetTL;DR1 – it was nearly impossible for me!
TL;DR2 – may be it was possible, if I had superpowers.

Let’s get into the details. I will make this quick with bullet points and try not to make this into a rant. And if you are up to reading beyond the boring facts, continue reading after the bullet-points to know how much fun it was trying to change a ticket booked on Jet Airways website.