Am I in the wrong or is my boss just shitty?

Today is a public holiday in Australia, thought everyone who doesn't request to still come in will automatically given the day off… but my boss called me saying that I'm in the wrong and I need to tell him when I want holidays off (even though I received no notification and they never told me in person) now his saying I won't be getting paid this holiday at all… seems very sketchy to me…