[Resolved]  Indigo Airlines — booking sheathing

I booked and payed a ticket with mymastercard, online at the indigo website for 8000inr and receved confirmarion. The next day i receve a confirmation of the same flight on my name booked and payed by my mastercard for 150 euro (Same as 12000inr). But this last ticket i did not book. I email and call them, and they tell me they got the payment and booking don by me and they can cancel my flight with a fee around 4000inr. If you ask me it is a planed consious crime. What are my options, cancel the flight lose the cancelation fee and get it over with. Or will they return my full money? How can i prove?

I lost my trust in indigo.