If you have a genuine grievance, then I would contact my local MP and outline in detail why you think you have been unfairly treated. If you have documentary proof, then send copies. He probably will not read any of it but will forward it with a note to the Director of the CSA. At least your matter will be looked at at the highest level. I was untruthfully accused of non payment direct to my ex over a five year period. I could produce payment slips for the whole time. Even so, the minnions at the CSA believed my ex and were in the advanced stages of stopping me huge amounts per month at source.
Within 10 days of writing to my MP, I received an apology. No one took any action about the lies told about me tho'.
Hope this helps.



