I NEED ADVICE. ❌❌❌❓❓❓⁉️⁉️

Hey guys, I know this has nothing to do with anything but I’ve been having troubles with my boss at work and she’s been harassing and bullying all her staff to the point that one of them transferred departments. She doesn’t like me for some reason. I’ve told her that I can’t work Sunday’s due to having soccer games and family dinners n all that. And I called her and told her if I can come in early so I can leave early because I can not skip my games cuz I’m paying $400 for it. And all she tells me is “you’re going to have to miss it like you did last week” and last week I missed my game because I OD on Advil and had to go to the hospital and do exams. I also missed the other week because I wasn’t feeling good she she got very mad at me and told me I had to stay because she doesn’t want to close,(I went home crying so much and puking everywhere because of the stress and how she treats me, I’m only 18..)

So what do y’all think I should do? I’ve complained to the store manager about her and they won’t do anything. Everyone else in my department also complained and they still do nothing. I’ve been failing my class because of the amount of stress she gives me. I can’t quit because I have to go to Mexico for family reasons. She talks behind everyone’s back and does stuff she isn’t allowed. Any thoughts on what I should do?