for feck's sake, can people who dont know what they are talking about stop giving bs advice ??
to cancel an xbox membership paid for by a credit card, you NEED to call in, you can call the hk xbox hotline if u are in hk. i would look it up for u, but the website is ridiculously slow from where i'm at ...
Xbox.com | ?? Xbox.com
alternatively, and esp. if u hate talking to people as much as i do, you can buy a 1-month prepaid gold membership card and input that as your method of payment. your gold membership will expire automatically after that month.
have fun. at least i think the waitline for the xbox hotline is quite decent.