H4cs.com — unauthorised credit card charges

I have had 2 monthly credit charges of $78.93 (Aud) for a dating and escort service which i have never subscribed too. My bank statements, states that the website calling themselves h4cs.com with acquirer # 8522 made the charge. I have tried to find this website to rectify the issue, but the website doesn't exist. Emails to this site back as delivered.