I took my car for an oil change and tire rotation,...

I took my car for an oil change and tire rotation, I received the oil change but didnt get a tire rotation until I had to go off...but the charge was on my bill. I knew they didnt rotate them because I marked my tires. As I was going to check my car, they said you have to pay...I told them I have to check my car because I dont trust mechanics. And lo and behold my tires were not rotated. I asked to speak to the manager and when he came, he tries to tell me they did rotate my tires until I showed him proof...then he wanted to apologize and he said well he had all the equipment out to rotate them but I guess he got distracted, yeah well you didnt get distracted to charge me. Of course I was disappointed because that means now I have to wait another 15 minutes after an already hour and a half to finally get my tires rotated....