Walmart Auto Care Centers

I came in to the auto center about a month ago, the service was so slow. I was getting 2 new tires put on the car..I was told it would take 1 hour, it took about 3 hours. I drove home, parked and went out of town for a week.. I came home and have been driving,something is definitely wrong with the tires.. the car is shaky and all over the place. I called today to ask what they actually did to it.. the girl said the balance is proab off.. I asked can you look and see what was done, she told me to bring it in.. the problem is i dont have 3 hours to sir and wait.. so I asked again what was done, she hung up on me.