Google Adwords take money without user permissions

1. I used Google Adwords at 2006, I stopped running ads at that time.

2. And I tried to login again at Oct 14 2008, I only login and check my account status.

3. I didnt click / change any payment options, and I didnt set any auto update options from that start.

but SUDDENLY I got this email from Google after 1 or 2 hours later.

This message was sent from a notification-only email address that does
not accept incoming email. Please do not reply to this message. If you
have any questions, please visit the Google AdWords Help Center at
https://adwords.google.com/support/bin/topic.py?topic=8336&hl=en_US to
find answers to frequently asked questions and a 'contact us' link near
the bottom of the page.
------------------------

Hello,

This is to confirm that on Oct 14, 2008, we received your payment of
JPY10,000. This amount has now been applied to your Google AdWords
account.

Thank you for advertising with Google AdWords. We look forward to
providing you with the most effective advertising available.

Sincerely,

The Google AdWords Team

Your AdWords account number: (DELETED!)

Google Ireland Ltd.
Gordon House, Barrow Street
Dublin 4, Ireland

Registered in Dublin, Ireland | Registration Number: 368047

What? I did paid JPY 10,000??? I didnt do any payment! Why?

Google Take Money from People without user Permissions?

Even there is refund options, I feels really bad for this case.

== UPDATE ==

They cancelled it finally, but Istill feels unconfortable, so I have cancelled AdWords Service from my google account finally.