#3 - Sept. 2, 2010, 3:29 a.m.
You will need to contact Billing to have that trial removed prior to the trial time expiring, Tankyu.
Billing & Account Services
Hours: 7 AM to 8 PM Pacific Standard Time
How to contact:
Phone: 1-800-592-5499
Argentina: 0800-333-0778
Australia: 1-800-041-378
Chile: 1230-020-5554
Mexico: 001-888-578-7628
E-mail: billing@blizzard.com
Web form: https://us.blizzard.com/support/webform.xml
When the trial on your account ends, it will also be removed. However, if you wish to speed things up, a Billing representative would need to help directly. =)