Car Service

After I took my car for a service she was fine, the next day my car was jerking badly, I took it back to the dealer and told them what`s wrong, they said it is strange that the computer didn't pick anything up, the gentleman said I must bring it back the next day, I said that I can`t I will bring it on Monday, so as I took my car back on Monday the guy said that he replaced the wires and that the jerking would stop, my boyfriend said that he must put the old wire in the boot, but he never did. ever since my car is not driving as it should, Why do we pay so much for a service when you get your car back then nothing is right..<br> <br>