Sheridan Labs review: Charged £4.95 and then £95 for two 'free' samples 1

I responded to an offer to receive two free skin care trial samples with no obligation to purchase anything else, this was advertised on my Yahoo 'home' page, so I thought it was safe. I was asked to provide credit card details which I understood to be for postage to cover delivery costs of these samples. I received one package from an address in West Lothian and saw an amount for £4.95 on my credit card collected the day before the package was sent, so thought that was it. The package contained a box with 'Equinox' day and night serum. The only paperwork with this package was a despatch note detailing the contents as '1 Equinox code eqdna30' there was nothing in or on the contents mentioning any price, or repeat order. When I requested the free samples on the internet there was no mention of any repeat orders. A few days ago another package arrived, this time sent from J.E.M Marketing in Cranleigh, Surrey, it was a duplicate of the 'Equinox' serums I had already received. The only paperwork this time is a returns note from 'Sheridan Labs' stating if you wish to return the item you need to detail your six-digit customer number on the left hand corner of your address label. Of course when I looked for this it isn't there, surprise, surprise. The bigger shock was today when I checked my credit card statement to find an amount of £95 had been taken by 'Ski Spark Equinox', presumably for this second delivery which is identical to the free sample. I am now trying to get my credit card company to help. DO NO TOUCH ANY OF THE COMPANIES DETAILED IN MY COMPLAINT ABOVE AS IT IS OBVIOUSLY SOME SORT OF SCAM.