In that case I suspect that you did a (voluntary) cancellation because you initiated the cancellation in anticipation of one or more of the flights being cancelled by LH already. This is a very common mistake - the reality is that although you couldn't book the same flights/the flights had no availability the itinerary was still "alive" and valid in your reservation. In this situation DO NEVER EVER cancel the reservation online but call the airline when you are sure that flights IN YOUR RESERVATION has been cancelled.