Myntra.com — account hacked and someone used my credit and myntra not taking immediate action

Address: Pune, Maharashtra, 411045

My account was hacked last night and when i woke up i saw someone (I have the details of them as i received an order confirmation email) had ordered from my account using all the credit i had. One item in the order already had got shipped. Called up myntra and cc rep was not able to sense the urgency and said superior will call in 24 hours. This is not acceptable. Also the hacker had changed my mobile number on the account without otp (Hopeless myntra security) and also i was not able to reset my password using email. Finally due to another security flaw from myntra, i had a session from yesterdays login on my hibernated pc and i was able to use that very very surprisingly to change back my mobile and somehow got to reset password as well. However this same can be valid for the hacker if he has his session open, he can change things back again, but myntra does not sense the urgency. Therefore this complaint. Please take immediate action.