How can I have the State of Nevada correct their accounting errors?

I have three financial spread sheets of three different time periods-- one being a transaction history in 2006, the second was done in 2011, and the last was just recently done in December of 2015. These spread sheets are audits on my child support case from the State of Nevada Child Support Enforcement Program. In November of 2006 I paid $6k too this department for arrears which then gave me a total of $405.96 amount of credit too my child support account. I discovered from the second audit of 2011 that the $6k of the money I gave too this department for the arrears on the account too be zero-ed out which was slightly more than the total balance of the total arrears, was only partially deducted.