我发邮件问了一下，一下是HMV的回复
Dear Customer,
Thank you for your e-mail.
As for your inquiry, we checked your membership information,
and then we found you subscribed the service of music distribution,
"USEN 550 ch x HMV", on 17 August 2016.
It should be that you applied to the campaign which you could get 100 Ponta points
and 1,000 Coupons after you placed the order which order number is #43703448.
You have been applied with the free charge service for the first month, August 2016.
The monthly usage charge is 529 yen, and the charge for next month service is
settled to your credit card the end of every month.
Therefore, you have been charged 1 time on 31 August 2016.
[About "USEN 550 chx HMV"]
http://www.hmv.co.jp/usen/
Please note that you will get Ponta points and Coupons because the payment of the first
usage was completed successfully and your membership is now qualified with the present
campaign.
[To resign the service "USEN 550 chx HMV"]
https://www.hmv.co.jp/login/auth/?AUTHTYPE=MEMBERS
↓
After Log in,
The Bottom of the left side on Account Top Page
↓
"USEN × HMV"
↓
"サービス停止"
↓
You can stop the service, and the charge will not be any more.
Thank you for shopping at l-tike HMV.
We look forward to your next visit to our website.
Best regards,
----------------------------------------
Please do not reply to this email.
Mail sent to this address cannot be answered.
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HMV E-Commerce Customer Service
K.Yamagami
424-6, Kitanagai, Miyoshimachi, Iruma-gun, Saitama-ken
354-0044 Japan
https://www.hmv.co.jp/contacthmv/
是订购音乐CD后订的一个HMV音乐服务，第一个月免费，以后每个月扣530日元
[To resign the service "USEN 550 chx HMV"]
https://www.hmv.co.jp/login/auth/?AUTHTYPE=MEMBERS
↓
After Log in,
The Bottom of the left side on Account Top Page
↓
"USEN × HMV"
↓
"サービス停止"
↓
You can stop the service, and the charge will not be any more.
这是退订方法