[bjt]

The standard remedy for any breach of contract is a lawsuit for damages. You claim that the recruiter's breaking of the contract cost you X dollars, and you sue for X. If you think can convince the court the recruiter was especially naughty, ask for punitive damages too. http://www.law.cornell.edu/wex/Damages

The Google/Apple/etc case is a bit different because it's between competitors, not between two parties to a given contract. Antitrust is about preventing/punishing anticompetitive agreements and behaviors.