Swiggy — payment not refunded for my order

Address:

Mumbai City, Maharashtra, 400065

I ordered some food online for delivery and paid through debit card. However their delivery executive refused to come and canceled order from his side. And now Swiggy refuses to return the paid amount as well. Their customer care service simply keeps repeating that they cannot process a refund without giving any reason as to why not.

The order was placed on 16/12/2019 for amount of Rs 643.00 and the order number was [protected].