IndiGo Airlines And Make My Trip — Harrasment by Indigo airline at airport

Address:

New Delhi, Delhi

This is to bring to your notice about my sad and horrifying experience with indigo airlines. I got three tickets booked thru make my trip from Delhi to Bangkok and vice versa.
Delhi to Bangkok: 16 Jan 2013 time 18.25
Bangkok to Delhi: 31 Jan 2013 time 1.05 am. Airline PNR: WRWFDI
Passenger names
a. Ishpal Singh Makhni
b. Shilpa Makhni
c. Aarav veer Makhni
Indigo airlines confirmed the tickets and I got the tickets via e- services.

When on 16 Jan I reached the Airport with my wife and three year old son at the check in counter I was asked to pay Rs 35000 more to take this flight as according to the Indigo staff at the airport I was exceeding my stay in Bangkok by one day as according to them the permitted stay in Bangkok is 14 days where as I thought that the permitted stay on visa on arrival was 15 days and I booked my seats accordingly. I was not informed of this while booking the seats by make my trip or Indigo where as Air Asia and other airlines make it a point to inform its passengers of all the visa related issues.
Then I was asked to meet senior person Mr. Upender of Indigo in this regard.
My complain is that why was I forced and compelled to pay this amount and why was I harassed at the airport while I was traveling with a small baby by my side it was like black mail because I was not informed by the airline and by make my trip of this issue when I checked at the Bangkok airport they said I could have stayed for 15 days .Then why was I forced by Indigo to pay such a huge amount for no fault of mine Indigo claims to be a economical airline but they blackmailed me to pay such a huge amount if Indigo knew of this visa rule why did they not inform me while booking the seats and why did the note this problem only at the last moment while checking in for the flight.
My question to Indigo and make my trip is as follows:
1. While booking tickets online why was I not given any details of such penalty or about this rule of stay of 14 days?
2. The Thai Visa authority can charge me penalty and not the airline.
3. Mr. Upender bargained the amount from 35000 to 27000 rupees at airport counter that left me with no other option but to pay the amount.
4. When I asked the Indigo person to cancel my tickets as I could not afford to pay such a huge amount he said then nothing would be refunded and the ticket would go waste.
I and my wife and infant son had to go thru not only financial harassment but physical and mental harassment too by the indigo staff.
My request is to Indigo to refund the extra amount I paid to them (which I was forced to pay as they blackmailed me to pay to them).
An early reply in this matter would be appreciated.

Ishpal Singh Makhni
1B/216 Bata Chowk
Faridabad
Haryana
[protected]
[protected]@hotmail.com