SBI Credit Card — internations fraudulent transactions without otp

Address:

Bangalore Urban, Karnataka, 560093

I have a sbi credit card. On 12th december there were 4 fraudulent international transactions made in my card at 22.45 pm, without otp.

No otp authentications were made for these transactions. How banks are allowing un authorized transactions without otp. Why rbi is allowing banks to do this?

I called customer care blocked my card and told that these are fraudulent transactions and cancel it immeidatley. I told them immediately on same date before merchant claimed the amount. But they said they can not cancel the transaction. I have to wait till the merchant claim it. As instructed by them i submitted dispute transaction on on 13.12.2017 then they are saying that it will take max 145 days to close.

First they allowing transactions without otp itself is not acceptable then not cancelling the transactions even after complaining about it well in advance.
The transactions details also showing here:

Allowing international transactions without otp is a loop hole, why rbi is allowing this?