I know nothing about the Indian legal system other than it draws a lot from the British one, but generally in cases like this the seemingly obtuse behavior is to prevent a precedential decision that others might refer to.
If they are suddenly on hook for refunds in a way they weren't before, there's a loss of potential future revenue and the additional cost of refund issuance bureaucracy. In a country the size of india even a 0.1% overcharge rate could add up to significant money. I can see why they would want to limit customers to disputing prices at the time of ticket issue.
It's not hard to find examples of private companies litigating over matters that seem superficially petty.
If they are suddenly on hook for refunds in a way they weren't before, there's a loss of potential future revenue and the additional cost of refund issuance bureaucracy. In a country the size of india even a 0.1% overcharge rate could add up to significant money. I can see why they would want to limit customers to disputing prices at the time of ticket issue.
It's not hard to find examples of private companies litigating over matters that seem superficially petty.