ASENDIA SIN They keep taking money from my Credit Card

After receiving my "free" sample and paying the postage... they charged me full price. I accepted that as I thought that would be the end of it. However ever since then they keep taking AU $146 out of my account & sending me more cream. The Post Office returned one package for me but I never received a refund. They have continued to send these packages to me. I have now 5 packages unopened and don't know how to contact these people. There is no name to look up on Google. I have searched everything I can think of... then I found this site and a report for this same product today. I don't know how to stop them taking my money apart from cancelling my credit card but I have payments that come from my account every week. I want to return these UNOPENED packages to them and get MY MONEY back... which is around AU$750... not counting the one that was returned. I am a Aged Pensioner and this is making my life a misery.