How do you complain about employment agencies?

To complain about employment agencies, first, gather all relevant documentation, including contracts, correspondence, and details of your experience. Contact the agency directly to express your concerns, giving them a chance to resolve the issue. If unsatisfied with their response, you can escalate the complaint to a regulatory body or industry association, such as the Recruitment and Employment Confederation (REC) in the UK. Additionally, consider leaving reviews on platforms like google or social media to inform others about your experience.