Few years back i ran Goodyear vectors on my T4 they cracked radially around the tire in the middle of the grooves in the tread after 6months and a few thousand miles. Had to fit new tryes, i chased up the warranty through national tyre and got 50% of the cost of my replacement tyres back as goodwill they claimed so i was still out of pocket. Given the tread blocks were intact and barely worn at time i felt a bit miffed but moved on. As your tread blocks look torn on the surface id expect they will claim that damage is likely due to hard driving and beyond what they consider reasonable use, equally i expect they will say that to have led to the cracks at the base of the tread block.