Myntra.com — account hacked

My account was hacked on 09/04/2019, morning 4 o'clock. Someone hacked my account, changed address and phone number and used my credits to order. I reached out to myntra immediately and response was that they will try to stop the delivery but they are not sure whether the order could be stopped from being delivered. All the customer care could tell me is register a cyber complaint. Also, there was nothing they could do regarding my myntra credits either. Disappointing response from their end, no option to even stop the delivery. The shipping address is of belgaum, looks like this address has been used multiple times for myntra delivery.