Human trafficking is the act of recruiting, transporting, harboring or receiving a person through the use of force or coercion for the purpose of exploitation. It is modern day slavery.
For the trafficking victim, it is uniquely difficult to get help. Language and cultural issues can create barriers and fear for seeking help. Traffickers will control legal documents and make threats against family members to keep victims in fear.
It is important not to assume that children and adults in contexts like prostitution are there of their own free will. People under threat and fear make choices for survival and their rescue can depend upon the trust they muster to report to authorities who will believe them.