Paytm — Money not received

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Paytm

My journey was booked on 18 with indigo, and they had cancelled our journey due to some reasons so they intiated us with 5000 rs refund which was from Paytm.. and before that we had changed our flyt date so they refunded with 696... Both have been intiated by indigo but the Paytm hasn't refunded us untill now..we hav called them several time but there is no response .. the total refund amount wud be 5696 rupees and the Paytm number is [protected] and the booking number is [protected]
its nearly a month n I've not received any response...