Pathetic / NO service from Samsung

I lodged a complaint on 16 October to which Samsung responded the same day saying they will investigate and come back to me. Since then I also sent emails and a message on facebook where they also promised to investigate and come back to me. To no surprise, they did not respond or give feedback after that. It is now almost 2 months that I am without the phone I am paying for. I had to buy another phone to use and together with all the phone calls and data it is costing me a lot of money. Samsung makes all this wonderful promises but they never adhere to them. Pathetic sercice