Non Profit Organisation- Accountable or Not?

I am volunteering in South Africa and am unsure of the applicable laws about my situation. I work through SASTS a volunteer organisation and i have payed them a great deal of money ~1900 US plus my airfare to volunteer here. THe understanding is that they give me 8 weeks of a project with food lodging and work included, and i travel for 3 weeks. They neglected to realise that school ends on the 30th nov. Therefore have no placement for me for 19 days. At this point NOTHING has been done. It looks like i will be paying for an extra 19 days of food, lodging and activities. What can i do? Am i entitled to compensation? How much and how do i go about doing it. There are approximately 10-15 others in my same situation and i want legal advice so i dont get screwed over because i had no knowledge of my rights. Please inform me what i am legaly allowed to do. Thank you..
Tyler South Africa

See your other post