If it's determined that your package is lost, you can file a claim with DHL to recover the value of your items, depending on the terms of your shipping agreement and any insurance applied.
International shipments can sometimes take longer due to several factors including customs clearance, international transit times, or unforeseen delays. Therefore, the best way is to check the status of your package by using DHL's tracking system. However, if it has been more than ten days beyond the expected delivery date and you still haven't received your package, it would be a good idea to contact DHL and the sender.