When I called customer support, they were overly supportive and outraged. It was very suspicious and obviously feigned. The guy there said that he would contact the post office immediately and get back to me! No worries! My package would turn up soon, it was clear that it was delivered to the post office! He could understand my frustration and would get to the bottom of this! Etc.
Nothing happened. A few days later I had an idea and went to the post office again. The same guy was there, remembering my case. He still insisted that the package never arrived there. Nobody from customer support or package tracking had ever contacted him, and the package wasn't even marked as missing. When I asked him to check if he had placed it in his "system" not based on my name, but on the name of the sender, he condescendingly laughed it off. But sure enough, that was exactly what happened.