Kotak Mahindra Bank — Unfair ECS charge

Hi Kotak Mahindra Bank on 2nd September 590 Rs ECS charges were deducted from my bank account. I had paid my installment manually on 1st August to Amazon Pay later. Installment was for 2 things one for was a product emi and the second one was mobile recharge on Amazon. I had already paid both EMI manually before the due date, it is really not my fault there was some error in the bank system. Why do I have to pay 590 for bank's mistake. Please refund the amount ASAP. Thanks.