MakeMyTrip India — unauthorized cancellation of flight ticket

Hello, i had booked a flight ticket on make my trip app for 10th august 2019 from kolkata to bagdoga on 8th august 2019. Booking id: nf[protected]. The booking was confirmed. Price : rs.4323. Next day that is on 9th august 2019 i found an unauthorised booking details on my app. Booking id: nf[protected]. Name: ankush sahu. I immediately called make my trip customer care... Number :[protected].. Time: 12:18 pm. And i complained about the said unauthorised booking and display on my app. The executive from make my trip verified my details and confirmed me that the said display is by some mistake and asked me to ignore that particular booking. Then i asked the executive to again confirm my ticket from kolkata to bagdogra and provided the booking id for the same. The executive confirmed my booking.
Now around 02:52 pm on the same day...9th august 2019, i received a message on my phone, on my whatsapp and on my mail id that my ticket from kolkata to bagdogra has been cancelled and refund is in progress. Refund amount : rs. 243
Original ticket price: rs. 4323.
I checked on my make my trip app and it was true. My ticket was cancelled and the other unauthorised booking (Ankush sahu) was also showing cancelled. I immediately called the make my trip customer care and complained about this cancellation. They transfered my call to someone named: imran. I updated imran about the complete scenario from ankush sahu booking display to my complain in the morning to cancellation of my ticket. He verified my details and told me that the cancellation was done from my end and he cant help me now. I told him that i have not cancelled my ticket and also about the fact that the other unauthorised booking (Ankush sahu) was also showing cancelled. I told him that i will incur a loss of rs.4000 because of this unauthorised cancellation but he refused to help me saying its my fault.
Because of all this i again had to book my ticket from kolkata to bagdogra at a much higher price (Rs.6439).
Please help me get my complete booking amount back from make my trip.
Rs. 4323
I have not cancelled my ticket on make my trip. Its a fault from their end.. Of their doing.. Why should i incur a loss for that (Rs.4323).

I am a very old and loyal customer of make my trip.. I am very satisfied with their services till now. This is my first ever complaint against them. But if i am not wrong then why should i bear the loss.

With regards
Kinshuk roy
Cell number : +91-[protected]
Mail id: roy. [protected]@gmail.com