Is the government trying to remove you from the United States?
If your answer was yes, then you should pick up the phone and talk to an experienced immigration attorney. The worst mistake you can make is think that your case is not serious, if your case was not serious then the government would not be wasting their time chasing you around. The trial attorneys for the government are attorneys who have gone through a rigorous training process not only will they most likely no every bit of the law they might have handled hundreds or thousands of cases.

What is deportation?
Deportation (also called "removal") occurs when the federal government formally removes an alien from the United States for violations of a number of immigration or criminal laws. Once deported, an alien may lose the right to ever return to the United States, even as a visitor, unless his rights are protected.
Removal is a legal proceeding, and an alien who is subject to this procedure has legal rights prior to being removed from the country, including the right to challenge the removal itself on procedural or constitutional grounds. The legal process leading to removal can be over stressful. Although you have a right to be represented by an attorney, the court will not appoint a public defendant because immigration proceedings are civil in nature. The function of the immigration judge is to (a) determine if the respondent has trigged one of the grounds of inadmissibility or deportability, (b) if the respondent has available relief and (c) the immigration judge will determine if the respondent has the legal and discretionary standard to be granted the relief sough.