Answer: The best source to contact would be Amnesty International
Explanation: There are many organisations within different countries that deal with protecting vulnerable groups such as women from human trafficking, but Amnesty International is a global organisation in this regard. They are in the best position to render help and may link you up with relevant local organisations and/or authorities.
Amnesty International is a global movement of more than 7 million people in over 150 countries and territories who campaign to end abuses of human rights. This includes human trafficking. The organisation is funded by members and people from all over the world which makes them independent of any political ideology, economic interest or religion bias.
The ultimate goal of the organisation is to create a world where human rights are enjoyed by all. All these make them the best source to get information about protecting women from human trafficking.