Oops meant to add this website.
http://www.moneysavingexpert.com/
Hopefully she will find something useful on it. I am sure there will be an option for her to transfer her current balance onto another credit card that offers interest free payments for the first 6 months - 1 year. Again, if she does this she must destroy her first card and not use the second.
I dont know the full details but I understand that if the debt is over a certain amount and she is struggling she can ask the company to freeze the amount and renegotiate payments but I would presume that this course of action would affect her credit rating. Sorry to be a bit vague on that one but perhaps someone else can shed more light on it.