Never ever connect your "Smart"-TV to your network, or if you have an incurable impulse to then make sure it's on a firewalled gateway-less VLAN. Take the money you save buying the thing (compared to what a profitable "dumb" version would cost) and buy a surplus corporate mini-workstation system, and slap LibreELEC/Kodi or whatever on it, and use that device as your "smart" device. No good for you can ever come from bringing the TV onto the internet... ever!
(Also: never paypig, never subscribe!)