Hydroderm they offered me free samples for the cost of postage. I did not receive the goods but my bank account was debited for two lots of postage and over $200 Australian dollars for the goods!!! I dont know but USA

Over a month ago I received an offer when using the internet, to trial Hydroderm products free of charge except for the postage.  I ordered two products that I believed were to be sample products. Two lots of postage costs were taken out of my account immediately. I emailed a few weeks ago and asked to have the postage costs put back into my account because the samples had not been received.  I got an email back saying they were on their way.  I decided to cut my losses and forget about ever receiving these samples and deleted all relevant correspondence. I still haven't recieved the goods however I have just discovered when checking my bank account online that . I have been charged over $200 Australian Dollars for two full sized products that I didn't order and which have not been received!  I am out of work at the moment and this is an absolutel disgrace. Can you please help me retrieve this money.  I would be most grateful if you can.  Thank you