Indigo Airlines — didn't receive back refund after cancellation of flight no 6e-575

Address: 110053

My indigo flight 6e-575, 04/01/2018, 13:10 was cancelled but i do not get refund back. I make a call to indigo helpline number, receiver told me, if flight is cancelled than you'll get full amount return in 24-48 hours. Still i am waiting.
So please do some necessary action to refund my amount.

Pradeep sharma
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