Chev rip - off

<p>Recently took my vehicle to Chevrolet dealer when I detected a miss on motor. After whole day I received vehicle back and paid R 1169 . They informed me that wrong spark plugs was fitted and they did a diagnostic test but couldn't find any error codes stored in system. Before I drove home I listened to idle of motor and it was still missing. Phoned the next day and informed them that vehicle was still missing. I took it back and waited the whole day again. When I received my vehicle it was even worse than before the rev counter was going up and down between 900 and rpm. They informed me that they did a wet and dry compression test and that cylinder 3 had a problem. Also a software upgrade was done on computer system and that they couldn't find the problem. Now it was a mechanical problem and they have to open up the motor. I refused and drove off. Next day took it to a normal mechanic and he said nothing is mechanically wrong with motor like burned valves or faulty lifters. There is no performance issues when driving vehicle. I still have this problem with my vehicle's idling. Will never trust a dealer again !</p>