They really are a useless bunch!
I was unfortunate enough to be left in the financial mire by my ex (she stopped paying the mortgage so i had to clear arrears, she ran up huge bills on our c/cards etc) and last year I had no choice but to declare myself bankrupt. When you do this HMRC give you a nil tax code for the year and you pay the difference to the official receiver. Imagine my suprise and bewilderment when the CSA, who ONLY take account of your net income, tax and NI, said that i then had MORE disposable income and put my payments up an EXTRA £200!!!! Their response... thats the rules so tough!!! Try writing to your MP!!!
They are a joke!