1 day old qn90c 43 usage mode has decided to grey itself out and i cant get it back

[Live1]

Got new tv today I just unboxed it and was excited to see the quality so went to the retail mode it asked for a pin I entered it then my phone rang so backed out of the setting to go and do it later,so after the phone call I go back to the usage mode setting but this time its greyed out,my tv has not updated or anything as it is not linked to the internet, I factory reset it 10 times and still I cannot get this setting back it's still greyed out ,I'm probably going to return it tommrow because this isn't normal the setting should not suddenly lock you out of them for no reason ,anyone got any insite on this?how do I get the usage mode to not be greyed out?,like I said it was not greyed out at first and my other Samsung tvs are not greyed out 

[Live1]

Lol you think I dont know that ?the tv has been factory deset 20 times  and Samsung support even remote logged into the tv and couldn't work out what was wrong 

[Live1]

Sound like you are being very silly lol

[Gurky]

Well you've come to forums for help, a thanks for the suggestion but no would of done. Hopefully you buy a different brand next time 🤞

[Live1]

You sauce me of something fishy and offer zero help you didnt even read my original post, and you expect thanks wow just wow