Ecs bounce

Hi, I had my ecs signing done on the document for my icici bank although while providing cheques i provided three cheques of icici and two cheques for kotak. I had got three transactions processed from my icici account and two were processed from my kotak account for which i thought my next transaction will be from kotak so i kept the funds in kotak instead of icici. Later They tried to take the funds from my icici bank again for which i received message of emi failure. As per the financial person from renault was been told my account had got a bounce of ecs on the fifth installment and was also been told my foir transaction were from kotak and not icici and also stated there will be additional charge for 590rs for the same, for which i stated them will not be paying the ecs as was not my fault as they were debiting from a different bank earlier. Please assist me for my defence on this matter as i am not willing to pay that ecs amount as was not my fault. There was no communication of changing my bank debits in regard to the same by renault finance. And also if you could advise the regulatory body wherein i can raise my complain regard to the matter