Flipkart — Security Loopholes in Flipkart Paylater - Need Refund

My account was hacked by a scammer pretending to be a flipkart agent. my only mistake was that I shared my OTP to update the mobile number, but my number hasn't changed in my account; and suddenly Rs:1091 was charged on my account (17 times) that adds up to 18, 547 within seconds.

I suddenly went panic and deactivated the account, only then it stopped.

It was a serious fault in the security system of Flipkart, I neither got any OTP for approving the transaction nor I could see the placed order in my account. The Order ID in which I was charged against was not even in their records, (I enquired this with the flipkart agent)

I raised complaint to Flipkart and IDFC Bank (Which takes care of the pay later service on the same day)

Flipkart Complaint Number: IN[protected]

Its been a week, still I didn't receive any response from the team.

Also attaching the Screenshot of Pay Later account statement.
As per RBI Guidelines, flipkart should take the full responsibility of these security loopholes in the system. I wonder what kind of security measures they have in place if someone can place order in paylater without even logging into my account? and the order was not even showing in flipkart

Hope Flipkart responds to my complaint!