401(k) ADP Compliance??

I have been employeed by a rather small technology consulting company in New York (about 30 people of which many are on visa from India) for the past three years. I regularly contribute the my 401(k) plan despite the lack of a corporate match and have maxed it out each of the past three years. I make a decent salary compared to the sponsored aliens, and I do not believe any contribute to the 401(k) plan as they have little use for a retirement plan in the United States.

I recently received a check in the amount of roughly $4,000 from my plan sponsor. This check was taxed at 10% and described as a withdrawal for an "EXCESS CONTRIBUTION CURRENT YEAR." I called the plan administrator and they told me that the check was due to ADP compliance failure and that I was considered a HCE. I found this laughable, because while I might make more that the average Indian developer, I don't make nearly the amounts that some of the executives make.

While I'm not asking for free advice, I am asking for a teaser of what case, if any, I have here and what my rights may be in such circumstances. To me, if the government says you can conribute 14% this year, then I should be able to contribute 14%.

Thank you in advance.