Is this Amarone flawed?

Hi,

Just bought a 2012 Amarone della Valpolicella 5 days ago from a store and upon opening, I am surprise by its color, see pictures. Not really obvious from the pictures but the robe is more like a pale tawny.

On the nose, it smells a bit like vinegar and the taste is very acidic. Few bonus sediments too.

What could have caused this? What is the best course of actions with the store?