The answer
If you no longer want to keep a domain, contact us in good time from your account email with its exact name. Cancellation must be explicitly requested and confirmed. Do not rely on non-payment to end the domain.
Cancellation, deletion, transfer and statutory withdrawal are different processes. The terms and withdrawal information explain the applicable rights and requirements. Existing statutory rights remain unaffected.
What to do
Check the deadline and exact domain name in your account.
Explicitly request cancellation from support.
Wait for confirmation and consider the effects on website and email.