Billing and Bad Attitude

I am currently paying an account which was handed over to Koegelenberg. After calling for almost 3 months trying to get someone to change my banking details,finally someone does change them into my new account. We agreed that my account should be debited on the 26th Of each month. And also requested that they send me banking details too so that I can, to add into my account paying it off. On the 11th Feb my account was debited by Koegelenberg, I called to find out why this has happened the lady could not give me a proper answer.After emailing her she sent she has sent my query to the correct department.Today she says I should call Marieta.<br> This company should provide better service to the people,THEY SHOULD NOT BE ACCESSING PEOPLE'S ACCOUNT anytime they want.<br> Please assist me as this should be happening, we agreed on the 26th why check my account everytime they want