UNAUTHORIZED DEBITED ORDER

I called in last week because my debit order date change did not update. I spoke to the lady Simone or Maureen who's English was so not clear. She wanted me to pay for extra 3 says before she can change my debit order to the 1st as their system didn't provide for the 28th which is my salary date. I told her to keep it to the 25the as our communication get lost in transit. I told her I was gonna pay manually she must keep my debit order as is on the 25th. She agreed. I payed, that was on the 26th. To my surprise I was debited on the 1st. How is that possible, who gave rain authorization to debit on the 1st. I need my money back please as I have other debts to pay. You cannot be going in and out of people's account without consent. And please, sort out your call center.