Answer: A lawsuit and a plead to a court or even the Supreme Court.
Explanation: When it comes to government, the judicial branch is the ultimate check to other branches that may pass laws that are unconstitutional. For example, in Citizens United v. FEC the government ruled against itself when it initially barred Citizens United from airing a critical film of Hillary Clinton right before the 2008 primary elections. The SCOTUS found that this decision violated the 1st Amendment. This situation proves that the judicial branch is necessary in checking the government's power, giving a proper reason why a citizen should rely on the court to take care of them when they feel that they have been done wrong or unjustly by government entities.