Indigo Airlines — Registration fee and interview letters

Sir,
I got messages from indigo airlines they i approach to them to conform and they told about all information and asked me to pay money for registration amount i payed them later they asked me to pay training fee of 7625 which i cant effort i asked them cancel my letter and asked my money backup but they haven't gave any response to that and lifted my calls those people name vivek roy _, ishmankan chowhan_, and one another person sended my interview feedback letter for that i haven't gave any of my information they send me mail after one call of interview his name is deepak kumar _ so tell me how we can find original company and letter