She may well need help with her debts. There are various ways of dealing with them, depending on her circumstances and what she wishes to do. If she needs advice make sure she contact a free advice service - local CAB or Stepchange are two.
And if her credit rating is bad now because of the debts it may well be that she wouldn't be able to rent without a guarantor anyway because landlords & agents normally insist on a credit check before agreeing to let.