Requested cancellation date outside of notice period.

Http Response Status Code: 400

    The requested date for service cancellation can not be
    fulfilled because it is in violation on the cancellation
    policy of the service.

    This is usually when the requested `decommission_at` date
    is outside the notice period.

    The response fields `decommision_at` denotes the earliest
    date possible to cancel the service.

    Your obligation to pay for the service will end on the
    `charged_until` date.

    The earliest cancellation date can be queried through
    the service's `cancellation-policy`.