Standard Chartered Bank — interest rates charged on fine levied by bank

Address:

560076

I have used my credit for paying my fees of 1, 91, 500
The company has a cash limit of 1, 50, 000 for which 1, 500 fine was levied. I paid 191, 500 and asked the company for reversal of the fine charges

Following which the company declined to do the reversal and added interest for the partial payment which has amounted to 10, 000 rupees.

I think i have been overcharged. Please let me know how to handle it.