Amway agent goes off with the cash

I was approached by Adri (***) to join Amway. I was reluctant since I am mostly based in Malawi and Amway does not deliver to Malawi. The lady called Adri (who reports to someone called Tracy) then eventually persuaded me to join. She came over while my son was present, this was on Sunday the 9th of August. She had to do it then so that she could deliver the goods to me before I left on Monday the 10th of August She took R70 from me as joining fee and I had to buy for 20 points or more. I order the 1 kg of washing powder, the dishwasher cleaner, the dishdrops and the toothpaste. I gave her the money in cash. The total was about R700. Whilst she was there I call came through to her and someone invited her for lunch. as the transaction was done I said to her that she would have to make it a late lunch. She also needed my banking details. As she was in a hurry I gave her a cancelled cheque which she promised to return the next day. The next day she turned up without the goods and without my cancelled cheque. I had to leave for Malawi without having received my goods. She did not return my money to me either. The cheque I have stopped, but I want my money back.