Tata Sky — new set top box purchased not working

The set top box was purchased in the month of february 2015.It was working till two weeks ago.after a rain all of a sudden it stopped working .my consumer number is :[protected] and my name is bk gopakumar my phone number is [protected], [protected] .I tried several times to contact the dealer but no answer.Please rectify this urgenty.I purchased it through sunny electronics, tripunithura kerala.