MZANSI FIRE AND SECURITY

A representative came over to my home and advertise an alarm system. He said that they will give me a "FULLY INSTALLED" Security system. I was happy and agreed upon a contract. When Technician came over he requested that I will have to install my own back up battery as that's not part of a FULLY INSTALLED system. So to me I've been falsely been advertised something. They still insist that I get my own Battery. I feel that's not fair.