How can i get a world of warcraft account?

I want another world of warcraft account. ive already had one and i still have the disk and my account hasnt been deleted yet, but i still have to activate it. but i don’t think my parents really like me paying 15$ a month for a computer game. i can i ask/convince my parents to let me get another account. they usually would say oh your not responsible or something like that. Any advice? Please help!