Google play store registration with smart tv does not work?

Yesterday I bought a tv on ebay classified ad there with a guarantee certificate and guarantee when i wanted to start it yesterday i had the following problem it is a smat tv and can also connect to Wi-Fi and also have internet but can't log in to the google store and at youtube also not… So youtube and netflix were already on it from the system itself but when I want to log in to youtube it doesn't work but can also log in and watch netflix yesterday I didn't even try and then I wanted to google Register in the playstore enter my login data and then the loading bar comes up and the message timeout of the connection please try again as if the internet was not working then I even plugged in a LAN cable but didn't work so no plan where the problem is

Did you just reset the TV to "factory settings"?

Yes, I've already tried, unfortunately, the same thing always comes out