Kotak Mahindra Bank — Ecs return charges refund

Hi my name is shaloo lohchab and i have an account with bank acc with kotak mahindra bank. i have a loan from dhani for which my ecs in last month got return as we had couple of family memeber loss bcoz of covid and we were not able to check on balance. but for that the bank has deducted more than 3k from my acc. i was not aware of any such return bcoz i nver got any msg call or email from bank informing abt sme and even the charges were not reflecting on the app. I call the customer care then we came to know what are the deduction. i ist my hunble reuquest to the bank kindly waive off those charges and refund the money as bcoz of pandemic we are struggling on every front . the customer care is not ready to listen