2015 Kia Sedona Wheels Problems

THIS IS THE THIRD KUMHO CRUGEN KL33 TIRE THAT HAS HAD RADIAL RUN-OUT OR TREAD SEPARATION IN LESS THEN 6 MONTHS. FIRST TWO WHERE ON THE FRONT AXLE AND MOST RECENT ONE IS ON THE PASS REAR. THE RECENT EVENT WAS ON A RETURN ROAD TRIP COVERING ABOUT 230 MILES IN I 10 BETWEEN SAN ANTONIO AND HOUSTON, THERE WAS NO ROAD DEBRIS OR OTHER ISSUES THAT WOULD HAVE CAUSED TIRE DAMAGE UNDER A ROAD HAZARD. SINCE THEN THE TIRE HAS DEVELOPED A WHEEL HOP AND VIBRATION TO THE REAR.

VEHICLE HAS 12,000 MILES ON IT ROTATE TIRES EVERY 4-5000 MILES. NOTICED A LOUD NOISE COMING FROM THE WHEEL WELLS ON THE INTERSTATE, DROVE TO THE LOCAL MECHANIC, CHECKED OUR WHEELS FOUND SQUARE SPOTS ON THE INNER TIRE TREADS. UNSAFE TO DRIVE HE CALLED IN TIRES AT THE TIRE SHOP, TIRE SHOP LET HIM KNOW THAT THEY ARE USING THE SAME TIRE ON THE NEWER MODEL BUT THE WORD EXTRA LOAD IS ON THE TIRE, REPLACED TWO OF THE TIRES BECAUSE MONEY IS SCARES. COMPLAINED TO KIA CONSUMER THEY STATED IT IS THE TIRE COMPANY'S PROBLEM (HANKOOK) AND NOT KIA. CALLED HANKOOK TIRE HQ IN NJ AND THEY STATE IT IS KIA AND HYNDIA'S PROBLEM. THIS IS A VERY DANGEROUS SITUATION WHERE THIS IS A FAMILY TYPE VAN AND THE BELTS ARE STRETCHING AND EVENTUALLY THEY WILL BRAKE POSSIBLE INJURY AND OR DEATH. DON'T KNOW WHERE ELSE TO GO NO ONE IS LISTENING.NEED HELP WITH THIS SITUATION