Confusing Calendar

It should not be this hard to figure out if I have to work or not.  I've called my school every day this week, except for the day I showed up in person, and can't get a straight answer out of anyone.  Well, that's not entirely true, so far I've only spoken with the secretary but each time she says someone is supposed to call me and no one ever does.  This morning she asked for my cell number because she said someone tried to call my apartment yesterday and no one answered.  Except, I was here all day and no one called.  I would just show up tomorrow at my usual time but there's an odd schedule for after tests and of course, no one can ever tell me exactly what it is.  One person will tell me something then another person will tell me it's changed then the principal will tell me she doesn't know for sure and to ask someone else and then that other person gives me a completely different answer.  So I have no idea what time my classes start, if they even have English class tomorrow, etc.  So I guess if I don't hear from anyone by this afternoon I'll just show up and hope the principal is there.  It's a school, they have to have a schedule, why can't anyone ever give it to me??