DMI Finance — Request for Refund of Wrongly Deducted Amount

I had maintained sufficient balance in my account for the last month's EMI, but the auto-debit did not happen. A penalty was then charged. When I received a call from your company, I was informed that I would not have to make any extra payment and that I only needed to pay the final EMI. I paid the final EMI as instructed.
However, this month an amount of ₹751 has been deducted from my account. Since my loan has already been fully paid, I request you to review this matter and refund the deducted amount of ₹751 to my account as soon as possible.
Thank you.