Domino's Pizza — refund of the failed order

Sir, i just ordered a pizza from domino's app. After a few minutes it showed that the order has failed and there is no sign of refund. Rupees 300 has been deducted from my account. I am teally worried about it. How do i go about with this? By when should i expect a refund? What should i do if i do not get refund at all? What is the indian contact number for customer support. A kind consideration of this complaint is required from your end.
Thanking you in advance.