Macbook Air sub-standard, Warranty a total *******

Their devices are nonsense and their warranty is deliberate. I purchased a MacBook from FNB last year. Two weeks ago I tried to get hold of their device provider (digital planet) of which all they did was miss call me. My laptop went blank. I took it in for repairs through insurance and they advised me that the damage was a component failure which they do not cover. My warranty is 12months and its been almost 12 months. I still have 13months on a 24month contract to pay for this device but it can't be fixed because the people at digital planet claim my warranty just expired. So I'm sitting with a dead computer. I don't understand how a brand new machine that hasn't been dropped or had any physical harm occur to it just goes dead without any cause. I want them to own up and replace this laptop I can't be paying for something that they sold that is substandard. Please note this was not a pre-owned MacBook it was a brand new MacBook from the box. Fix this I can't be paying so much for nonsense. Nothing was wrong with it and then one day it just went blank.