Indigo Airlines — not allowed to onboard and excessive fare charges on next flight

Address: Chennai, Tamil Nadu, 600093

Dear indigo team,

I have travelled in your carrier multiple times in the past but i never faced a humiliation as such in my last trip. I booked a ticket in idigo through cleartrip on 28th in 6e-907 from chennai to delhi. While there was a scan check delay and security delay i was late to counter by 5 mins. I rwas refused to onboard citing delay. But still i has 15 minutes of time to clear my security and reach to flight gate. Despite my request, it was turned down. And i was asked to pay additional 3170 in offer to board next flight 6e 3752 (Seat number 10b). Whereas there were similar passanger who came much late to me was offered in same flight at much loer rate of just 950 rs. His name is muralidharan. Why different rate? First of all it was delay due to scan check in indigo to go to counter check-in. Despite i said ok, i should have been given ticket which is at same prices what offered to another passenger. Why excessive charge for me alone?