Bad attitude/poor customer service

I was called yesterday by a consultant, and ibtold him that i have changed my banking details please change them for me, tge consultant told me that he is unable to change and i told him that there is no way that your company can not change details for debit order, whats the use of leting you keep bank details that you will not get the money, he told me tgat he will speak to management, as am waiting for feedback i am receiving call at 7am today from a consultant who harrassed me who dont want to listen to what I have to say. I told him that i am waiting for feedback and he told me that he dont want to hear about feedback he want to hear about payment, call was dropped. I dont know if is tge way he should interact with customers.