Utter incompetence

I have a debit order that goes off every month for the past 3 years on the 7th of each month. I have phones the financial department several times because for the last 6 months you keep phoning me every day from the 29th of each month to tell me that I did not make a payment. EVERY month I tell you to check the system of the approved debit order. EVERY month I have a conversation with a manager assuring me that they see and will update the system and will not phone me. Again yesterday and today, 5 calls later, me asking to speak to the manager AGAIN and the consultant just put me on hold. Utter incompetence! Why approve a debit order (again 3 years ago) of you are going to phone me every month for late payment?