2011 BUICK REGAL Tires Problems

PIRELLI PZERO NERO ALL SEASON TIRES. P235/50ZR 18 97W 45,000 MILE WARRANTY. THIS WAS MY 1ST PURCHASED OF THIS BRAND OF TIRE IN 2015. AFTER ONLY ABOUT 15,000 IN 2016, I WAS INFORMED THE TIRES WERE BALD AND NEEDED REPLACED. I WENT BACK TO PLACE OF PURCHASE & PIRELLI GAVE ME A DISCOUNT FOR SAME TYPE OF TIRE AS REPLACEMENT, 4/8/2016. I NOW HAVE BEEN TOLD THESE TIRES NEED REPLACED AGAIN TO TIRE WEAR. I HAVE BEEN GETTING ALL TIRES ROTATED EVERY 3 MONTHS, SINCE I OWNED ANY CAR WITH ANY TIRES. TELEPHONE STARTING 8-7-2017 WERE NEVER RETURNED TO DISCUSS STATED TIRES. I FOUND CONTACT INFO ON BBB WEB PAGE, LEFT MESSAGES FOR CUSTOMER SERVICE AS WELL AS 2 INDIVIDUALS NAMED AS PRODUCT/MARKETING. NO RETURN CALLS.I ALSO TOOK A SCREEN SHOT OF THE BBB WHICH REFLECTED CUSTOMER COMPLAINTS IN REFERENCE TO THE WARRANTY ISSUES WITH PIRELLI TIRES. AND EMAILED IT...

MICHELIN LATITUDE TOUR HP 235/50R18 TIRES ON 2011 BUICK REGAL. TIRES REPLACED NOVEMBER 2014 AND WORE DOWN TO 4/32 TREAD ON DEC 19,2016. TIRE WAS RATED FOR 55,000 MILE WEAR. LACK OF TREAD CONTRIBUTED TO ACCIDENT ON THAT DATE. CAR WAS UNABLE TO STOP, SLIDING INTO THE CURB CAUSING $4200 IN DAMAGE EVEN THOUGH ACCIDENT WAS AT LOW SPEED. MICHELIN WILL NOT REPLACE TIRES. CAR CURRENTLY BEING REPAIRED. DAMAGE TO WHEELS, SUSPENSION, STEERING GEAR..