@Dee_Evans it sounds like their devices are using a random MAC address to bypass your blacklist/blocking. The only way to prevent them joining the network is for TP-Link to update the firmware of the...

@Mikesb just to be 100% sure, is the BT hub set up in "modem only" mode? And if not, have you considered setting the BT hub as the router (still with wifi disabled) and setting the Deco mesh up in AP...

@Mikesb when you say a BT broadband hub do you mean the fibre connection coming directly into the property or do you mean the BT internet router supplying the ISP wifi? If you have an ISP router and...

@Mikesb I had the exact same problem with my non-pro XE75 units. My only solution was to swap the ethernet cables from the fibre modem to a different socket on my main Deco and for whatever reason my...

@ScottFern as far as I know there's no built in toggle for random MAC addresses on LAN cable connections in Windows 10/11 but depending on how tech savvy your son is it's very easy to download a...

@RBZ5416 Join the club Possibility to change WiFi channels - Home Network Community (tp-link.com)