Being charged the amount of #4.95 on my visa credit card every month for something I don't want or even know what for.

my august statement has 2 charges from your company that I didnot AUTHORIZE and you need to stop charging me for this poduct I asked for the free trail and that was it Please remove the $74.95 and the $5.95 for what I don't know this is my 2nd request to stop billing me
thank you