Incorrect DEBITS!!!

I have sent you numerous emails, notifications, queries requesting that I be debited on the 25th of April again and my debit order date to be changed. I have only ever received one email from your consultant who claimed to have called me but just sent me an sms. I sent her an email saying that debit me on the 25th of April. But guess what MFC debited me on the 24th and that is third time that I have debited on the incorrect date for this month!! I am Uspet!!!!!!! This the worst way to start a relationship with you but I have bad bad experience after bad experience after bad experience and its really disheartening. Please may I be sent an apology, please mt these rejected debits not affect my credit score. I am expecting a response in writing!!! And I have since made payment!!! Do not debit me again until the 25th of May