Rocket Lawyer

I signed for the services, which provided the company www.rocketlawyer.com. it wasn’t mentioned on the website that they would start charging me for something. I noticed that they took $39, 99 from my account. I wanted to get more information, but the rep refused to give it and told to check the website. But there is no information about subscription fee. Please, help me. I need to proof them that they owe me money.