Installation of OVHD Satellite

I WOULD LIKE TO KNOW, I BOUGHT AN OVHD SATELLITE DECODER FOR ALMOST R2000 JULY 2014. APPERANTLY THE WARRANTY ON THIS IS ONE YEAR BUT THE INSTALLATION ACCORDING TO FULL HOUSE IS ONLY 3 MONTHS. SINCE THE INSTALLATION HAS BEEN DONE THE TV WENT OFF WITH NO SIGNAL NUMEROUS TIMES FOR 3 TO 4 HOURS. BUT OUR SATELLITE IS NOW WITHOUT SIGNAL FOR 5 DAYS AND FULL HOUSE WANTS US TO PAY FOR INSTALLATION AGAIN? WE BOUGHT THE SATELLITE FOR CLEAR VIEW AND NOW WE CAN'T EVEN WATCH TV!! I'M FURIOUS...BECAUSE I'LL HAVE TO PAY THEM NO FOR THE REINSTALLATION