Wrong debit order date

I signed up for a debit order to be taken out on the 1st of each month. To my surprise, after more than a year of doing so, then today you decide to take money out of my account. On the 25th. Who gave you that permission? How many laws did you infringe doing that? This is the first and last time this is happening. If it happens again, I will terminate my insurance cover with you. There are a lot of other companies willing to respect my instructions that will provide me good cover.