Refusal to fix damaged LNB cable

I am very unhappy with ON-Air after purchasing their DSTV Explorer PVR product in January 2016 and i experienced problem with LNB cable due to lightning. When i reported it they told me they don't cover it even though is still brand new and i am still paying for it. Then one wonders if they don't cover it, so does that mean every time when there is lightning then you have to pay R1400 to fix the LNB cable since even multi choice does not cover it? This is very frustrating.....