Hello
Are all the debts on credit cards and just in your Mms name? If any of the cards are in joint names there maybe some issues especially if your father is the main card holder.
Options would include your mother contacting the credit card companies and trying to negotiate lower interest rates alternativey she could contact a debt solution company and asking them to do this on her behalf. There are lots of companies out there who can provide this service some charge a fee and others are free. Consumer Credit Counselling Service are a charity funded by creditors alternatively you could contact Debt Advisory Line, they have won the Debt Management Provider of the year 2009 which would suggest they offer the best advice.
http://www.debtadvisoryline.co.uk/ http://www.cccs.co.uk/
Please let me know how you get on.