Blizzard White Scammed into a $94 teeth whitening pens that burns Internet

I saw a 8day trial for Blizard white teeth whitening pens and signed up. I was charged $1.03, $3.87 twice and i called and cancelled on the 8th day because i forgot but I was still charged $94.31. I had 8 days to try so im sure that i shouldnt be charged untill the 9th. The shipment arroved late and i had no idea that they started counting from the day you place the order. I did use the trial pen once and the other two hasnt been opened. I tried to explained to them on the phone that the product irritated my mouth and it burned so i want to return the product, to no avail. This is an obvious scam, i just regret the fact that I didnt domy reserch before signed up for this, reviewson the internet shows that this is a habit for them because many others have been duped into this scam lf a trial