Kotak Mahindra Bank — upi fraud happened

Address:

110091

Respecred sir there is a fake person who called up for our 2nd hand stuff for buying he said lemme pay you advance through paytm. Upi linked bank
I shared my paytm no. Some linked shown in paytm accept option pop up i accepted 3 times because he said its not working n i lost my 24000 in 3 times 11k 11k 2k
I ragistered a compalint in police stayion and then in my bank kotak mahindra bank they said will resolve this within 90 days now they ate not refunding my amount. I have shared nthin with him so i want my refund back my bank account no.[protected]
Kindly help in refunding my amount