Indian Overseas Bank — I lost my money from Ecom one 97 communication

Address:

SUNAINA MANZIL PERUMKULAM PO MANANAKKU

Sir / madam
3920 rupees debit from my Indian overseas bank account on 16/10/2021. I try to pay school fees bt school fees is not submitted and amount debited from my bank account through Ecom one 97 communication. I try to pay school fees through smart school pro app via paytm but school fees is deducted from Ecom one 97 communication. Please refund my amount.