It may not be easy to dispute it, but I don't see any other way than to do whatever needs to be done to correct it with the Department of Education.
I'm not sure if they can help, but the Taxpayer Advocate may have some suggestions:
<a rel="nofollow" target="_blank" href="
https://www.irs.gov/taxpayer-advocate">https://www.irs.gov/taxpayer-advocate</a>
