This usually happens for one of these reasons:
The subscription was canceled after the renewal date, so it had already renewed.
The cancellation wasn’t completed. Check its status at https://my-drama.com/settings → Subscriptions.
You have another account with an active subscription, for example one created with a different email.
To avoid future charges, see How to cancel a web subscription.
Canceled in time but still charged?
Write to us at support@my-drama.com with your account email and the date and amount of the charge, and we’ll look into it. We may email you for a few more details, so keep an eye on your inbox.