I replied to an ad on the internet for a free trial for teeth whitener. I received the product and instructions, no invoice or any other material stating that this a a free trial for 10 days. When I paid by last credit card statement I noticed that there was a charge for $85.37 for Wierfit. I called my credit card company, and they advised me to call the telephone number that was on that statement. When I called Wierfit, they stated that when I requested the product, shipping charges had to be paid that that I agreed to receive monthly... read full review »