You've given her excellent advice OP - I like to work in my university library & at the moment it's rammed - but the kids seem to be doing an awful lot of FB messaging & the like.
I think what it is her flat mates are all doing better, ie she has just got her results back and she's got 55% - she wanted a better mark - now she's got it into her head everyone in the whole world is doing better than her (she is a bit dramatic)
55% is an absolutely fine mark. It's a solid 2, ii, and demonstrates that she's keeping up with the work, with room to improve. It's pretty average - so not failing. And if she "wanted" a better mark, then she needed to put in the work.
Also - it's worth remembering that "Comparison is the thief of joy."
She needs to take the initiative and see her personal tutor, or her tutors on her modules. But she needs to prepare for this. And also realise that (in the UK at least) academics are starting on huge marking loads, to be done by the end of May ...
So she should not go in and moan about 55% as "failing" - it will irritate the very people from whom she seeks help.
She should also not go in and just say "I don't know what to do" or variations on that plaint.
She needs to be specific about what extra advice she seeks. And she should do the work beforehand - a plan, a list of what she's read so far, and some specific questions about the specific assignment for which she's seeking help.
But a warning: if she's not taken up opportunities to do formative work (ie opportunities to submit trial essays or the like for feedback, but no marks), or tutors' office hours during the term, or extra revision sessions (I always offer those), or been noticeably absent, or noticeably not done the reading for seminars, then she may be reaping what she sows. A tutor may try to guide her, but if she hasn't done the work, there's not much we can do.