Customers Completely Ignored

I received quotations for an alarm system and armed response at a property that I purchased in Somerset West. I was sold a certain alarm system with blue evolution remotes x 6. When the installer came, besides the fact that they messed up the installation in a big way I was told that what I was sold cannot be implemented. They had given me other ADT remotes. Since I have paid only 50% before installation I have been e-mailing and phoning ADT to get updated paperwork for the system that was installed as well as wanting to speak to a technical person regarding the remotes not working from a distance as I was sold with the initial remotes. They also have to come out to connect my phone line to the alarm for armed response. When I phone the call centre I am promised that someone will phone me back but no one ever does. I have sent various e-mails to the sales person, the technical manager, the customer service agent as well as to the general customer service line but I have received no reply. I have also phoned the call centre but I am just being ignored. This has been going on since the 13th April for the last 16 days. I think I made a big mistake going with this company.