Alignment...not

I took my car into MPG a couple weeks ago for an alignment. They told me they couldn't complete it because my front left strut mount was shot. They would need to replace the strut mount and both front struts, which would cost $825. My struts had just been changed out 18 months before (they didn't think I was smart enough to remember?), so I bought a new left front strut mount (for 20% less than what MPG was going to charge me) at a car parts store, and a friend of mine changed out. Except it didn't need to be changed out. There was nothing wrong with it. Not only did they lie about the whole need for repair--beginning to end--but they wasted a couple hours of my friend's Saturday afternoon. If I could give MPG negative stars, I would.