How can I block unauthorized device from accessing my Gen 2 Starlink Wi-Fi.

I am using Gen 2 Starlink Wi-Fi and it was passworded. But I notice that their some unauthorized device that are connected to my network.

I changed the Wi-Fi password on three occasions, some of these devices are still connected to my network.

I also tried to paused them but they still access my network with use of random Mac Address.

Please, can someone help out on what to do to block them from getting access to my network.