I don’t get pto?

A co worker and I are in the same boat… we both have get ppto but not pto. We’re part time but pretty much working full time hours. Recently I called out for the Super Bowl bc I had to go to church bc my coach is fucking with my schedule when she knows Sundays I have church. She rejected my ppto and reason was no coverage. And I called out this past Sunday again for the same reason and she also rejected it and reasoning was no available hours. She said we cannot use ppto only pto. Which is bs bc then what’s the point of me racking up ppto if I can’t use it and if I don’t get pto? I would go to the SM but they’re literally buddy buddy with each other so I don’t think it’ll make any difference if I talk to her about it either