MFC just taking!!!

When you start your day with an email from MFC to say that they are adding a value added service to your account with out your permission. I phoned the call centre and I get told it will be escalated to a department. I’ve sent proof of my short term insurance to MFC and received feedback to say that MFC have received the mail. Yet MFC still go ahead and add the amount and they can’t change a debit order it is to much trouble. I must be happy with 21 days and just suck it up. Since when can MFC just take money with out my consent?? MFC, you are *****ing money and that is so wrong!