Domino's Pizza — not providing refund for a failed order

Address:

Sunder baug chinchwad, 411019

I have ordered pizza by applying egv coupon on 30th september and my order my not successful then also they are not providing any refund and not assisting properly they don't believe in customer satisfaction. I want my egv balance back in my account. My registered no [protected]. I just want same order or my egv coupon back so that i can use it again n.