Housing benefits

my disabled daughter with learning difficulties,attends college and has a health care plan where it used to be statement of education needs, and has to register each year, during the summer holiday she is charged rent for being a non dependent, which takes so long to sort out I end up in rent arrears, being told she shouldn’t have to pay, and another person saying she needs to pay rent, I’m so confused, she is claiming high rate dla & mobility, also esa, please can someone advise me as each time I have spoken with housing benefits they have never given me a straight answer and hundreds of pages to read through that none of it makes sense.