It may be possible that the package is still in transit and is not lost or delayed depending on what class of mail is being used and how long ago it was mailed.
Tracking your package on the Kuehne + Nagel page is very easy, all you have to do is having your tracking number with you, because the first thing you will see when you will enter the official website of the company, will be a search bar.
Kühne + Nagel was born as a freight forwarding company in 1890 in Germany, and since then it has evolved in many areas.