How do I get State Distubution child support stopped after I have a child support stop order??

I was awarded custody of my children in feburary. In the same order I was to not have to pay child support anymore of course. I have turned that order in to my employer at least 5 times. Called and sent the order to the state disturbution unit several times. And still nearlly 8 months later everyweek childsupport is coming out of my check! Now when the suport was ordered it took less than a week for it to start! So why is it taking so long to stop? And just exactly what should I do other than whats been done to stop it????