Indigo Airlines — Refund my amount

I got SMS reg indigo Airlines job vacancy through shine.com, I contacted them then they ask me to pay 1500 for aptitude test 1st round, then I completed telephonic interview, then they ask me to pay 7500 for verification then only you will get your offer letter so I paid, then they send confirmation letter reg job, then they ask me to pay 20, 000 for training amount, I got some doubt so I enquired about this then I guess this is somewhat fraud... Then I ask them to refund my amount because I won't like to join.. They also said after 45 days we will refund the amount but till now they didn't refund and didn't attend my call also please help me to get rid of this problem I have call recordings, and confirmation letter everything with me her name Reshma Singh and Sonam singh