ICICI Bank — auto debit return fee wrongly deducted

Address:	345001
Website:	Apply for Credit Card 3 Simple Steps ... www.icicibank.com

Dear Sir,

I'm using icici bank pletinum credit card from last 06 months. I made all the payments with out any issues.

But today is my payment due date i.e. 30 Jan 18 and total bill was ₹ 18614.26/-. Which have already paid on ₹ 7686.26 on 27 Jan and left over amount ₹ 10928 today. when i saw the current statement, they charged penalty under auto debit return fee and [protected]@18% of ₹ 450+81.
When I complaint to customer care executive they said It is wrongly deducted but refund can' t done as there is no such policy.
This time I feel cheated despite timely deposit my bills.
Please intervene in this matter and get my hard earned money refunded.
Thank you.