Kia Sportage in-car Navigation, how do I update or buy features?

the1lemming Registered Users Posts: 1
New Traveler
edited January 2019 in Built in car navigation
I have just bought a Kia Sportage which has in-built TomTom navigation.

Does anybody know how I can update the TomTom fratures or even purchase new features for my new TomTom?