ICICI Bank — Debit my account incorrectly

My savings account has been debited for Rs.17500 on[protected]. When I called the customer care, they were least responsible and dint give any proper updates and they were also like, how the money is been debited.

Upon me chasing, they came to know that my account is debited incorrectly by Amazon. But how can ICICI allow to debit my account without my authentication (CVV/OTP).

ICICI refused to refund my account and they took a long process for refund of the amount. They made me to wait for 10 days to revert back the amount. I was affected by COVID-19 that time and was struck without money that time, as ICICI has looted my money.

My issue is how can ICICI allow to debit my money without my authentication? What is the safety to keep the money in the account?