Kotak Mahindra Bank — Extra amount deducted by kotak bank on loan emi

I have taken a EMI option for cult gym from kotak bank and first EMI 967 is debited on August 2nd and another amount of 353 has been debited but not sure why they have deducted that amount first the payment is debited by auto debit option and i have sufficient amount on bank account there is no reason for late payment or shortage of amount from my account. Transaction ref "Ins debit a/c CFB" the customer support of kotak bank is not supportive for reach for issues. Please check and resolve