CSA charging me despite having a private arrangement

May 3, 2016

I received a letter from the csa last year saying i owed 3000 pounds for child maintenance arrears for the period 2002-2005 . i have two children who were both still children in that time period. i contacted the csa and sent bank statements for the period after this up to the present date as proof of a private arrangement.They replied that i still owe for that time period.. in that period i was also having the kids 3 days a week and supporting a house hold with step children. what i find confusing is that they are only asking for payment for one child and not the other.also i have told them we had a family arrangement in that time ..she has no proof i didnt pay her either..im very angry they have said this due to always paying for my children. any advice would be great many thanks.