NETSTAR ARE CHEATS - THEY TAKE PREMIUMS KNOWING THEIR UNITS ARE NOT WORKING

I HAVE BEEN PAYING NETSTAR FOR MANY YEARS FOR 5 VEHICLES. A WHILE AGO I ASKED THEM WHY 2 OF MY VEHICLES WERE SHOWING RED ONLINE AND I WAS TOLD IT WAS NOT AN ISSUE. RECENTLY I COMPLAINED AGAIN AND I WAS TOLD THAT THE UNITS WERE FAULTY AND WOULD BE REPLACED UNDER WARRANTY. ONE UNIT WAS PROMPTLY REPLACED BY AUTOAUDIO IN PIETERMARITZBURG WHILE THE BLUFF AGENCY REFUSED TO GO TO MY SON TO REPLACE THEIR FAULTY UNIT. I WOULD LIKE TO SUE NETSTAR FOR TWO REASONS - TAKING MY MONEY FOR MONTHS WITH FAULTY UNITS THAT WERE REPORTED AND LYING TO ME THAT THEY WERE OKAY. SECONDLY, FOR DELAYING IN REPLACING MY FAULTY UNIT WHILE STILL CHARGING ME. NETSTAR SUCKS!!!!!