RBL Bank — credit card fraudulent transaction

Address:

Chennai, Tamil Nadu, 600033

Hi,
My name is sujit and recently there was fraudulent transaction happened on my credit card. Immediately i called customer service and raised complaints regarding the issue and requested them to not to process the transaction and also block my credit card. The representative registered the complaint (Complaint #[protected] also asked me to send the dispute form. I immediately filled the dispute form and sent the scan copy to bank. But few days later i see that the bank have processed the transaction. How bank can do this when i have rasied complaint and also registered it in police.

Note: the person who contacted me was knowing that i got the credit card recently and also my registered mobile number along with my card expiry date.
How come the person know about this? Whereas i have used my card only in one place and no where else i used it. And also bank have not taken any action against this. I feel the bank is doing all this fraud activities they issue the card and they have separate team and does the fraudulent activities and the highlight is the transaction was done through yesbank.in site.

I kindly request to take necessary action regarding this.