Indian Overseas Bank — Debit through trtr

Address:

59/50 annanagar mannargudi

My father is customer of iob. He died on04 feb 2021. So i went to bank to close his account.That time balance is nearly 600. It was instructed to me to submit death certifiate and certificate of succession. After getting both certificate i went iob mannargudi (0896) again. There i got passbook entry and shocked 100 is balance.
On 8th june 2021 there is debit through trtr/[protected].
Then i gave request about withdrawn of 400 to the manager. Then iob customer care . But no solution. Would you please bring back the amount soon. Account number [protected]
thank you