Tamil Nadu State Transport Corporation [TNSTC] — Kindly refund the amount

Address:

Saveetha university, Chennai

I cancelled the ticket 2days before of my journey till now I didn't get the refund kindly check the progress it's been 3 days
Here is the ticket details
TNSTC Corporation:SETC, PNR NO.:T43371714, From:BENGALURU To CHENNAI-PT Dr.M.G.R. BS, Trip Code:2315BANCHE, Journey Date:01/05/2023, Time:23:15, Seat No.:19, 20.Class:ULTRA DELUXE, Boarding at:SHANTHI NAGAR BS.