Terrible after sales service on a new vehicle

5 weeks to repair faulty spark plug coil. 1 week later problem reoccurred. No apologies and we were refused access to the general manager to complain. No feedback while the car was in the workshop and we were told they cant guarantee the car will be fixed properly as they can only replace what the computer tells them to. Car was 400 kms from 30k service they refused to service the car while it was there as it was to soon. 1 week later the car service light came on.