How to update the map of Honda City 2014 Navi?

I've been trying to go to Garmin website and I could not find an exact solution, please someone, help.

If your car has a factory installed GPS navigation system, then it's probably NOT a Garmin product. READ your owner's manual, Check with the service department at your local Honda dealer, or try THIS web page…
http://hondanavi.navigation.com/home/en_US/HondaNA/USD

Then go to the dealer snowflake.