Engine Oil Leaking problems of the 2013 Mini Cooper S

I purchased a Mini Cooper S 2013 and noticed the car was hard to handle on the road at all times. The service department had told me that was normal for this type of car. I kept complaining and they finally took the car in to have it checked. They told me it the alignment was bad and the tires needed to be replaced. I was charged for the service, but I believe this was a manufacture defect because the car was like that from the time I drove it off the lot until the time of service. This, is a very serious matter if not only one car is sold like this. Not to mention the whole engine was leaking oil and the backfiring .