Anyone running into speed problems?

Got mine installed about a week ago. Barely get 100 Mbps down/up on the best speed tests. Went from downloading at 300 Mbps on spectrum to 30 Mbps on tmobile fiber. Wifi connection is solid. Supposed to be a gigabit connection. We're just using it however the installers set it up. Could there be a configuration problem here? It's testing this way even when standing right next to the router. It's a brand new market. Lines were literally laid a few months ago.