The CSA are corrupt B*stards.
Many years ago, they got an attachment of earnings against me despite the fact I owed nothing.
I had been stupid and naive and had been giving my ex the money but didnt get any receipts!!
At the time I earned about£900 a month.
They took £550 a month and left my new family to live on the rest.
My mortgage alone was £450 a month.
There is just no reasoning with them. The phone lines are manned by snotty 18 yr olds who try to patronise you. Mainly because nobody else would emply them.
(A friend of mine who used to work for the DSS said that even their own staff will not have anything to do with them even though they all worked out of the same office.)
Luckily my employer let me "leave" and then took me on under a different name
Since then I have wised up quite a lot with the help of TPUC and FMOTL
I would never again be bullied by any "authorities"
Also, have you looked on here. http://www.deadbeatdadsassociation.co.uk/
Shows all the corruption of the CSA and other organisations.
Hope this helps and good luck.