Kotak Mahindra Bank — Not resolving issue regarding payments

Hi, i was having a loan od 35000 against a washing machine i brought last year for my mother. A emi was bounced for the month of may it was the second last emi and later on i paid the emi 3500rs to their executive (piyush gaur) along with the bouncing charges of rs 750 which he didn't submitted to the bank. Then i thought the issue is resolved untill i opened the bank website on 1st of june which was showing amounts 1998.68 as pending and 3500 as emi of the month june. I paid that money as well. And i thought that it was all over. But i started getting calls and messages from the bank right after that as they told me I've this and that remaining balance on my account. I told their executives everything and it was taking a great amount of toll and i was very concerned about all these things. Couldn't sleep at nights. For almost a month. And between all this small amounts of money were getting deducted from my bank account and i was unable to put money in that account. I suffered a loss there as well as I'll have to pay penalties to the bank for not putting minimum balance in it. I've paid around 3400 rs over my emi of 3500 and still getting asked for money