For everyone who's thinking about volunteering with them, DON'T DO IT!!! They stole my money!!
They force you to pay everything in advance and advertise on their website that they will give you back a refund when you don't use all your days/weeks. THIS IS A LIE! They owe me so much money and never gave it back to me. I've been emailing them lots of times and I keep getting the same response. When I call them there's no anwser. And my money? I don't think I will ever see it again.
All I can recommend you is to not volunteer with them because they are thieves and they don't have any integrity at all!!!