Michelin Primacy 4 Tires Showing Tread Cracks After 80000 Km Use

I have been experiencing a tread cracking issue with my four Michelin Primacy 4 tires, which I purchased on March 31, 2024. The problem has been ongoing for about a month, and I have driven approximately 70,000–80,000 kilometers with these tires. The issue has appeared on all of them. When I contacted the call center, I was informed that the tires needed to be sent to the factory for testing, after which it would be determined whether the issue would be covered under warranty. I received the same information from authorized dealers. However, removing the tires from my car and sending them would seriously disrupt my daily life, so this solution is not feasible for me. Although the seller I purchased the tires from is not an official Michelin dealer, I have the invoice (Invoice No: AHM2024000000093). I request that my tires be replaced free of charge and that my issue be resolved as soon as possible.