Unacceptable Debit Order date change

I received a text from VWFS wherein they informed me that my debit order date for December will be on the 18th of December not the agreed on 25th. I responded and informed then I do not consent. Today the 18th the deduction when off my account. In order to make things more convenient for VWFS they unilaterally changed my deduction date without my consent and disregarding if I have sufficient funds in my account. This conduct the unacceptable and I am reporting them to the Consumer Protection Commission for ********* behavior.