They have "lost" numerous packages or more likely they are broken into and the items were stolen... They Have left valuable delivery items without a signature resulting in more loss...and to top it all off they routinely "forget" to pick up my packages when I schedule pick ups.
In the parcel pick-up and delivery business, you usually get what you pay for. Company-wide, DHL's service numbers don't even come close to FedEx. So, you've opted to roll the dice with DHL. Odds are it will eventually catch up with you.