Have I committed fraud?

I am not too knowledgable on what constitutes fraud but i think i may have accidently committed sometype of it. The story is as follows: So i went on this dating site but in order to check to see what members are in your area you had to sign up--they had a three day trial so i said, sure why not. I had this disposable mastercard thingy so i used that as my method of payment; however, i was not sure on what to put as the billing address and such seeing as it was disposable. I just made up one and stuff figuring that reguardless i would cancel my membership; if their were some decent women i would set up a better account. However, when i went to cancel, you had to phone in, it turned into this who big issue and they said they couldn't tell me anything. So have i committed some variation of fraud?