Un-authorized credit card charge.

On 01-22-2016 A charge of $9.99 was put on my credit card.  It appears that a "free fourteen (14) trial" has been ignored.  I was on-line for. as far as I am concerned, only on the first day of the "free" trial and never since.  The way in which the web site is run is that you cannot even go on it for the "free" trial without submitting a credit card number, which the company in question automatically charges for a "subscription" which was, and is not, wanted.  I just received my credit card statement, and will be having the charge reversed as of today.