So yesterday after work I went to my dealer service dept to get my first free oil change. I also asked them to check my left front tire because it was losing air. They offered to rotate my tires for a small fee, so I figured what the hell. Turns out I had a screw in my tire and that it was close to the sidewall so they may not be able to patch it, but that they would try, and had to put the pressure up to 65 psi to see if the patch would hold. It did, so I paid and went on my way. Almost immediately after I left, my TP warning light came on. When I got home, I check my pressure, and the left front tire was missing its valve stem cap, and was at 45 psi! This indicates to me that they didn't rotate my tires. What do you think I should do?