its not part of their job anyways?
The setup the ONT, and might plug your router in if you are nice. They do not supply the router and if its not one that your ISP has a deal with Chorus to sort out then your ISP might have their own tech to install the router.
Seamless means you don't have to recable the phones in your house and should be able to plug in the router and let it go. Call your ISP if the router doesn't work.