Either brain dead or refuse to follow customer instructions

I'm deeply disappointed. I've made strenuous attempts to give clear delivery instructions, and still they were ignored. Correct instructions were on the waybill AND handwritten on the package. Customer instructions are there for a reason. Having said this, I expected 2 parcels from different places and asked at the collection point about both. The second one had not arrived, and I accepted this (given the instructions). My landlord accepted the parcel and noted the instructions on the parcel. He said that I was phoned several times. Well, that may have happened when I was busy or my phone was on silent. What's for certain is that there was no voice message. PLEASE in future, use your brains. Leaving a voice message is not rocket science. All phones, including the ones the elderly use have a voicemail function. This branch is within walking distance of my home, but if I cannot trust them with basic instructions, I will have no other options than to ask senders to use another service provider as I will refuse to deal with this kind of situation again.