PLEASE HELP! trouble with seventeen.com?

i have a subscription and I want to keep that. But, I tried to do that freebies thing in the front of the magazine but i had to create an account to enter. i read the stuff and it looked fine so i entered the info and i didnt think it mattered cause seventeen already has my mailing info from my subscription. but after i entered for those freebies things, i started getting emails saying that my first issue is on its way and i owe $7 or something. i didnt read anywhere that it said i was getting a completely new subscription. and idk if they really are sending this but im trying to delete my online account and i cant seem to find out how to do that. please help! i dont wanna be getting an extra issue!