Indian Bank — money debited but payment failure

Address:

VIT university, 632014

I made a two payments for an event ideathon with reference id : idtn076397 twice. Money got debited from my account on 10th september but they didn't receive the payment. When i contacted them, they said they didn't receive but might got stuck in the payment gateway, i will get refund in 7-14 days. I didn't get it. When i contacted again, they said contact the bank. Could you help as money got debited twice with the same reference number