Ban on slavery, slavery trade and forced labour

The ban on slavery, slavery trade and forced labour is enshrined in Article 4 of the Universal Declaration of Human Rights.

In cases of violations of this human right (explained here),

All persons may turn to the these organs/institutions:

Human Rights Committee (if the optional protocol is ratified by the state)

Special Rapporteur on trafficking in persons, especially in women and children 

In the case of serious crimes (Genocide, crime against humanity, war crime):

International Criminal Court (ICC)

Children under 18 years may turn to:

Committee on the Rights of the Child

Special Rapporteur on the sale of children, child prostitution and child pornography

Women may turn to:

Committee on the Elimination of Discrimination Against Women

Migrants may turn to:

Special Rapporteur on the human rights of migrants

Migrant workers may turn to:

Committee on the Protection of the Rights of All Migrant Workers and Members of Their Families 

Indigenous people may turn to:

Special Rapporteur on the situation of human rights and fundamental freedoms of indigenous people

In the context of employment and profession:

International Labour Organization (ILO)

Persons being in an African country may turn to:

African Commission or Court on Human Rights and Peoples’ Rights