Web4cs.com review: fraudulent charge of $40

I received my statement and noticed this charge taken out, I have absolutely no knowledge of who these people are or why they are charging my card for anything. I tried to research the charge, but don't recall EVER using a service that would require such a payment. If anyone has information as to how I can get my money back, it would be greatly appreciated. $40 may not seem like much to most, but it's still my money.