Same thing for me. I asked for a free sample and then I decided to send it back because of the medication I take for a chronic decease. I wrote an e mail asking not to send me anymore and please accept my cancellation as of that date. I never had an answer and was charged 516, 48$ in just one month on my credit card.
I read they would not accept return to sender, so the first box cost me about 13$ to return to them. Now the second, I will return to sender.