Zomato — amount deducted but order not delivered

Address:

Indore, Madhya Pradesh, 452010

Hi i have made an order and used save50 promocode. The payment was done via paytm and i have the receipt and order id for date 7th october 2018. The money was deducted as i got a message from the paytm. Zomato's app said that 502 gateway not found.. I don't know what that means.. But my order was not placed.. I have lost my money. Please help on the matter and refund the amount in my paytm wallet.