SEM Essential for Home review: Unauthorized credit card charges

An unauthorized charge of $1.95 has shown up on my bank withdrawals from this company I never heard of and from which I have never ordered anything. I do not even know what the company sells. The charge was made on January 8, 2016. Though the amount it small I want a complete refund ASAP. 01/08/2016 SEM* ESSENTIL FOR HOME [protected] MN 01/07/16 $1.95