I had the same thing here in Ohio, despite the fact that I was ahead $400 ahead in my payment. They took another $500 from my state return. When I call the CSC I just get the usual run around. I tried to explain that it is impossible for me to get behind in my payments since it’s taken directly from my paycheck. I was even willing to show them my paycheck stubs.
To add insult to injury, an additional fee is tacked on to each of my payments which total around $400 a year for this “wonderful” service that the CSC provides.