Refferal rewards

They had a promotion to reffer people to their site and I was also reffered and received the money, when I reffered 4 of my friends I was then told we needed to buy international shares which was not the case, I have lost R3440 because I also lent my friends 105 each to buy the shares, I would have received 1000 rand and my friends 500 each, nothing was mentioned regarding international shares and a lot of people got their money without buying international shares, very hurt and disappointed because I wanted to use the money to buy food for my kids.