My car’s engine started shaking so I took it to a mechanic. The guy plugged a computer into the car and told me the problem was the spark plugs and coil. He told me it would cost $400 so I said fine. I get a call couple hours later and the guy is saying there is a problem with the car. He told me he replaced the coil and it didn’t fix it. He said that the engine stopped shaking, but now the car isn’t accelerating past 20-30 MPH. He told me that there is something wrong with the cars computer and I need to take it to a Lexus dealer. He told me he was going to look at it on Monday and see if he can fix it. He calls me on Monday stating that the coil was recalled and I should take it to the dealer to get it fixed. He said it would be free and I would be getting a letter from the dealer. I called the dealer myself and they said there wasn’t a recall on the coil. So the guy fixed the shaking but caused an even worse issue. My car isn’t accelerating past 20-30mph. He told me he wouldn’t charge me haha, what a gentleman. So I still haven’t picked the car up. I don’t know what to do. I feel like I will end up paying more now since the guy messed it up worse than it was. What should I do?