I ordered free sample of product recieved nothing then had £46.30 taken from my account

I signed up for the FREE TRIAL of Hydroxatone. When I received my sample it stated that I was going to be enrolled in a monthly program unless I cancelled within 30 days. I called the company and received a rma number and returned the sample to them with a receipt conformation request within 30 DAYS. I was billed 69.00 on my January Master Card bill. In December I called Master Card and informed them that I might be billed in the future. They called the company and the company rep. said that I would NOT be receiving a bill. I WAS BILLED!