wtf

I am SOOO pissed off right now. So I took my car in last night to get worked on and the guy calls me this morning saying "Well, I thought you needed the front wheel bearing replaced instead of the rear, there is a lot more involved with that so we are going to have to charge you more." I was a little upset but cooperative because it came out to be about $240, which is what I was expecting to pay. Then he calls me at lunch and says "well the bearing wore down the wheel hub assembly so that needs replaced or else it will ruin the new bearing." I couldnt believe it. The bill is now up to $420. How could a $90 job turn into $420? Its a good thing that car isnt in my driveway now because I would literally just set it on fire. Im searching online now for a cheaper hub, but its still gonna be about $100 for one, he was gonna charge me $170. I hate this freakin car! I will never buy a BMW again.....ever.