Express Oil Change & Tire Engineers review: Tire replacement

I came in because of tire leak and ended up buying a full set of tires from William, the manager of this store. I got them installed this past Monday. When I picked up my car I noticed immediately no valve stem covers. Then when I started it, I noticed the tire sensors still on. I went back inside and asked to speak to William. He told me just to drive the vehicle and the sensor would go off. I wouldn't leave till a tech checked the tires and put the covers on. I drove the car home and everything seemed fine until it sat for a couple of days and the light came back on. I brought it back today (Friday, they were closed for Christmas yesterday) and now he says the rim is cracked and it won't hold air. I am very upset and feel scammed into buy tires.