My manager doesn’t listen

When I first got hired I told her my availability. I can work on weekends from noon till 9:30 and that’s my availability for weekends and Monday. The rest of the week I can work anytime. She just scheduled me for 7 and 9 am for this weekend and next and when I texted her personal number (which I’ve done before for things like this) she messaged back saying to not text her personal number. I actually wrote my availability down on a piece of paper for her, twice. Because the first time she lost it. I’m so close to quitting because she’s been rude to me from the start. I can’t come in that early. So I guess if she doesn’t change it I’ll get fired for not coming in.