Land Rover LR4 Tyres

Replaced Michelins with 4 Scorpion Zero on a 2016 Land Rover LR4 at 58,000 miles. This is a low mileage, well cared for SUV with mileage well below the national average. When I had the tires balanced and aligned by our local Land Rover dealer. I was told that one tire had a defect and could not be balanced properly. I returned the tire to the retailer where I bought the tires, who agreed with the dealers opinion. They referred my claim to the Pirelli wholesaler , who, after six months indicated that Pirelli refused to credit the cost of the tire. Fast forward Two years and the tire remains with Pirelli and I am out almost three hundred dollars. But wait! There's more! Recently, I had a flat and when I removed the tire I noticed the tread wear was so bad that the tires needed to be replaced after only 22,000 miles. Tread wear was even on all four tires which I have rotated every 5,000 miles I am now ready to pursue Pirelli for a full refund given the claim of 60,000 mile service for these tires. Sadly, I loved Pirelli in the past. having had P6s and Cinturato on other foreign coupes and sedans. Could it be now that Pirelli is a CHINESE COMPANY, product quality has declined? This is my experience but I will never buy Pirelli again. So far --- only crickets from Pirelli.