Paytm — Asked for credit card details for refunding an amount

Address:

Pune, Maharashtra, 411021

I have received call from numbers [protected], [protected]

Emp nmae naina kshyap, emp id :kmb000213

The lady on call (after 5-10 mins of explanation) convinced me for sharing the kotak card details (for refunding kotak reward points). the transaction kotak card failed as it was identified to be fraud.

So she asked for my sbi card details to put the money of sbi card. i did refuse to give that details. but again with lot of validation she confirmed me he authencity, like stupid i gave her the further details of sbi about 3 transaction of about 4997, 4999, 4999 where done. i was also asked to share otp which again shared. as i was in hurry i didnt look at it much and shared details. but sbi didnt had that security to block tranasaction like kotak card.

I received call from kotak helpline asking if there was this transaction from paytm executed on kotak card and they confirmed me it was fake call.

I immd contacted sbi and blocked my card. they told me that transaction are now done cannot do any thing. i have to wait till the transaction is confirmed by merchants. only after that i can raise dispute.

My complaints are :
1. sbi card has no strict security poilicy like kotak. my transaction was stopped and also i received call from kotak for this fake transaction.
2. how do i get hold of this paytm?