Indigo Airlines — Spike fare by Rs 2000 by indigo after submitting the payment

Address:	122002
Website:	www.goindigo.in

Dear Indigo folks,

I am hoping it reaches the right audiences and Thanks for reading my email.

I have been truly disgusted with the quality of your service and must say I feel cheated. Can any responsible Indigo personnel explain why I was cheated??

Its pretty concerning the way flight fares spike for a moment and then become normal again.

After submitting the payment my ticket was not booked on goibibo as they said that the airline has increased the fare by Rs 1971after I made the last click on the payment gateway.

Original Fare: 5807 INR but I end up paying 7563 INR, GOIBIBO sends me a additional link to pay additional RS 1971 to book the tickets.

Attached is the PDF file Mr. Arora from GOIBIBO sent me over email as I wanted to confirm the new fare.

Below is a screen shot of https://book.goindigo.in/Flight/Select and I have some questions for the Indigo folks.
1. Why did the fare spike just for that moment when I was booking it ? Is there a dynamic reason in spike of the fare ? How do you manage to restore the fare back to original after the customer has completed the transaction ?