La fitness Falsely Informed an 18 year old on a contract. San antonio Texas

 A man at la fitness told me I was allowed to use my boyfriends credit card information and I could sign my name under it( which he didn't give my authorization to do) and the man told me that I could get out of the contract at any time all I had to was ask him so when it came time to when I wanted to get out of it he stared at me and said I couldn't I talked to a manger and they wouldn't help me so now I am coming to y'all to help me get out of this because if I do not pay it my credit takes a hit and I do not want to pay for something I did not want.