Friggin non-communicative Swiss

Got a letter some weeks ago saying that I needed to have my apartment available for inspection. They needed to check the electrical outlets or something. Compliant as I am I called them yesterday to say I'm not home, but I will put the key in the "milkbox", the box underneath the mailbox that is nowadays used for packages and not milk. Coming home I had a very nasty letter saying that I had not been available and this inspection is compulsory, and please call this number. Coming home around 11 pm I called. Guess what? No answer. So I left a very angry message saying you idiots had not communicated, that I did indeed leave the key and that I'm angry. Probably not such a good idea, but I get really irritated when people cannot communicate. Fortunately I have the name of the guy. So shame on him! Men!