Town North Mazda Car is not drviable after the service dept worked on it ,and they refuse to correct it's condition Richardson, Texas

After having my car back in for the 2nd time for some damages to a tire the dealership caused when they did an alignment on the car originaly,we picked up up the car & it had a very bad burning smell .That night my clutch went out ,after they towed it back in and took it apart  the service writer said the clutch was destroyed because someone at the factory had left a large nut inside the bell housing by mistake and it got cought up in the clutch itself. Even though we have 7600 miles on this 2012 car??? Well when this clutch came apart it smelled of smoke and  burning clutch disc material so bad I asked the service writer to make sure all of that was cleaned out before they reinstalled a new clutch. He said he would. Upon picking the car up againg it still reaks of this burn't clucth smell so bad it's it will make you sick. Also we have a big scratch in our wheel rim that wasn't there before. I called them back to voice my concern and i was passed to Tom their part time servicve manager who suggested I take it up with Mazda USA,I have filed a complaint but have recieved no resolution! Can't drive our new car ,smells like a burnt clutch!!! help