Indusind Bank — preclosure 2 wheeler loan account reg

My loan account no is TKU8035H.Iwent to your udumalpet branch on 17.10.18 to preclose my loan . But the branch manager refused to close the account and asked me to come after due date on 21st of this month .Even if I close the account my ECS will active and deduct the amount on due date. If the cheque bounced Rs 500 will be deducted or collected towards cheque return charge. After some quarrel with branch manager he asked me to remit the amount after leaving the last due amount and asked me to remit the amount to get pass the the last ECS. I don't understand what is the necessity to send ECS for last due even if I remit the full amount in advance.Please give me the reason for not closing the account in advance. It is the customer will and wish to close or not close the account. If correct answer is not received from your end I will approach consumer court.