HDB Financial Services — refund for excess emi debited from my account and stop this schedule

I have a product loan in your financial service, my loan no. 9266838. It's already completed in 02/05/2020 but in june month 1 extra emi instalment of rs.1633/- auto debited from my account and now again showing next emi installment will be debited on 02/07/2020. I need refund of my extra debited emi installment money (Rs.1633/-).
Please help me out and stop this schedule and refund my (Rs.1633/-) money. And if possible please send noc through e-mail, i will be very grateful for this.