Debiting a closed bond account

I closed my bond account but still you are debiting my account. I closed it last month, as i paid it off. what i don't understand is that i went into the branch and even called the call centre to close it. I was told that there is a refund due to me as i paid an extra amount. I was told that it take 4-5 working days for the money to come through into my account. I don't understand why is it that you still debit my account as if i still owe you money. Please stop because i really need that money to buy my groceries. I am financially strained and have nothing to eat at home. Please reverse that money because i need it urgently.