Engine light still appearing on dashboard after service

This is probably because who ever serviced the car failed to manually switch off the service-engine reminder light. This is often done via a scan-tool through the diagnostic port.

But in the case of your car, you should be able to do it yourself. Turn on the ignition and you’ll see that the service light is illuminated. With the ignition still on (but the motor not running) press the small button that you’d normally twist to control the brightness of the dashboard lights. After a few seconds, the service light should start to flash. Release the button and then give it a single push (but don’t hold it). Now turn the ignition off. If you’ve got the sequence correct, the next time you turn on the ignition, the service reminder light should have disappeared.