Airtel — non refund of recharge amount

Sir, I was recharged my prepaid airtel No [protected] on 16 Jan 17 through my airtel app with an amount of Rs 448. The recharge was not success & nor refund my amount to my airtel app or my credit card. I have already registered a complaint in customer care vide complaint reference No CONRC[protected]. During complaint, your anchor was assured that the amount will be refunded within 24 hours however, the same was yet not credited. pl do needful. an early action is requested please.