My AC adapter died the other day, so I called Dell emphasizing the severity of the situation, noting that I oversaw the purchase of four laptops from them, and encouraging them to get it shipped the next day. Then… nothing.
Well, this morning, I received two emails from Dell, each informing me the replacement part was shipped on the 24th. Checking the DHL tracking number provided, I see that DHL (while not leaving any sort of note on the door) has already tried to deliver twice.
So (a) Dell, for its sloppy customer service, and (b) DHL (I think) for its stealth non-notification of delivery attempts.