Travolook — Refund not done against booking cancelled more than one month

Dear Sir /Madam
I Have Booked A Flight Ticket For My Younger Brother OMKAR DASH In Indigo Through Travolook.In On 24th July 2021 For 31st July 2021 From BBSR To Bangalore In Economy Class & I Have Received A Ticket Without Any PNR Number With Reference No. : REF[protected] But Just After Booking Its Automatically Get Cancelled And Amount Of Rs. 5163/- Has Been Deducted From My Account . After Contact With Their Customer Care Via Telephone & Email They Replied That The Refund Will Be Initiated At Our End & The Same Amount Will Be Reflect Back To The Same Bank Account Within 10-15 Working Days. Now After Completion Of 28 Working Days Still Amount Has Not Been Recieved After Repeatedly Contact.
I Request For A Help Here To Get My Money Back.

Regards