You need to carefully read the written contract that you signed in that its terms and conditions control the obligations you owe the agreement as well as the obligations owed to you by the company in the absence of conflicting state law. Potentially the agreement may have a cooling off period within it for you to end the agreement without recourse.Additionally, depending upon the type of contract that you signed, your state may have laws allowing you to cancel the agreement within so many days of signing, for example three (3) days. I would e mail the company that you signed the agreement with immediately setting forth the reasons why you wish to rescind its terms and see what happens in response.Whether or not you are responsible for the entire membership costs depends upon what the written agreement states.