Continental All Season

I sent the tyres sent back to continental, whose response, not unsurprisingly, was 'tyres OK, it's your driving and alignment on vehicle'. Strange, that the three tyre specialists who examined the tyres before they were changed all said tyre wear was even, but excessive. I've had cars for over 30 years and never had even front tyres last less than 30-35k. Our other car is a Mini One - I've just changed the original front tyres at 50k - It would seem that either the Continental tyres are faulty OR they simply shouldn't have been fitted to the Meriva in the first place. Maybe it's Vauxhall's fault.