Indian Overseas Bank — Im complaining about failed atm transaction need refund

Address:

melapalyam tirunelveli 627005

I went to deposit 8000 rs in nearby iob atm[ melapalyam ] at 30 th april 2021 around 9 30 approx.. but the transaction was failed and i got the reciept as failed atm transaction. when i went top complain in my nearby iob branch they asked me to wait after i gave the complain letter. i waited and waited but by amount was not credited to my account its been more than 3 weeks . the bank staff told me there was no such transaction took place but i have the reciept of my transaction with me .and the lockdown started. i need my money in urgent for some personal issues as soon as possible. kindly do the needful and refund my money . thank you in advance