@Billymead8,
So you went in, saw you had that day off, turned around, walked out?
Didn't occur to you to talk to a manager, your boss, anyone about it while you were standing there?
Oh. No one else was standing there to ask? Maybe walk around and find someone, or phone (or call, whatever that difference is, apparantly there is a difference from your post), text, email?
When you didn't show up for work on Thursday, no one tried to contact you to find out where you were?
It's not so much you took an extra day off, but you don't have the mindset to think who you should be talking to about this. Like your employer.
So you haven't shown up for 2 days straight. If I were your employer I would assume you walked off the job, quit, without telling anyone.