Oil change service near Irving, TX

I took my car in July 2013 to get an alignment done and they told me that the bearings on the front right were bad and needed replaced. I got them replaced for $400-something for parts and labor, but after I left my car was making a noise when I turned to the right that made me uneasy. So a week later I took it back and they said they "put the hub on backwards" (which is impossible) but redid their service for free. So I left thinking that okay, they screwed up the first time but at least redeemed themselves. I was annoyed that I had to spend another 3 hours waiting on my car (I had waited 2 hours the first time they 'worked' on it) but at least they did it for free the second time because of their mistake. Now, in February 2014 I took my car in to a different shop and my boyfriend actually watched as they worked on my car (because he works there), and the bearing that Kwik Kar had replaced and put on there was so warped and the balls fell out as soon as they took it off. Kwik Kar did not do their job correctly and lied to me about it, I am EXTREMELY unhappy with their service and seeing what action I can take against them. The shop my boyfriend works at told me (and I am pregnant) that I could have had a very serious accident if I kept on driving.