What to do?

My oldest daughter K is in 7th grade advanced math. She was forced to switch schools due to a cross-country move in January. When she started the new school we realized their was a gap in the curriculum and she hadn’t learned some of the things they were doing here. We talked to her teacher and she assured us that she would help K get caught and it would be no big deal. Well it is a big deal. I keep calling the school and pushing the teacher to help and she says she is but either she isn’t doing enough or my daughter isn’t understanding (which I doubt to be the case). I may be forced to have her take regular math next year now because of this. I really wish I couldhelp her but it’s algebra and just am not remembering how to do it and when I do explaining it for me is very hard. She would be devastated if she couldn’t be in advanced math next year because school and her grades mean everything to her (and of course, who wants to discourage this). I am looking into tutoring but it’s expensive and I just can’t afford the prices I am seeing right now. Man this is really weighing on me.