Totally incapable

We bought an installation voucher for an OVHD dish at Game Menlyn on 10 November, which warranted a complaint on its own already. They said the people would call us the same day. A week later my mother called me to ask about the installation. When I called the number written on the voucher, they had no record of us, which simply means that Game Menlyn never bothered to enter our details on the system. Just didn't bother. Don't care. I dictated our information over the phone. The lady said someone would call us to make an appointment. No one called. Just now they pitched up at my mother's house. She wasn't there, I live 12km away, and the man was surprised that I asked him why he didn't call first. So my mother dropped everyhing and came home immediately, only to find them packing up again because they did not bring enough cable for the installation. SERIOUSLY!