Yes Bank — emi deduction of personal loan

The account from which my emi gets debited closed. 28 days before the emi due date i have requested the bank to update the account number from which emi due to be deducted. As per the instruction of bank instruction i have deposited the amount rs 850 and submitted the required documents. They assured me that the emi will be deducted from my updated bank account. However though i have maintained sufficient cash, the emi got bounced as they have issued standing instruction for the previous account.