Aditya Birla Finance — bank swap

Address:

400052

I have taken a loan from aditya birla finance limited. I am struggling to change my bank account from which my emi gets debited. Have received confirmation email, about bank change however the emi still not getting debited from the new bank account. I am getting remainder calls everyday after 1st of every month. And numerous text, to maintain sufficient balance in my bank account for the emi debit.