Yesterday I took my car to walmart for a regular oil change. I handed them the keys and they told me to come back after about 45 minutes. I came back after an hour and they billed me for the service and handed me the keys. I assumed that they had added oil, checked the batteries and everything. But on my way home my engine suddenly stopped and it wouldn't start again. I had to tow my car to my place and its been there since. Later when we checked the bill that walmart gave us we noticed that they had my name and phone number right but they had a different car on the bill. We then checked the oil level in the car and it was almost empty. Tried to jump start but didn't work. We went to walmart talk to the manager and they went though all the videos of that day. Apparenty they didn't even touch my car and gave it back to me as it was before. They couldn't find the video showing that they'd worked on my car. Now, they're saying that they've to go through their insurance company and see what they can do. But i'm not too sure about that. Can I sue walmart for their negligence and claim for all the damage?What is the name of your state (only U.S. law)?