cannot connect to apple tv

I've been trying to sign in to my apple tv(3rd generation) for hours now and failed. my apple id and password are correct, I tried adding the code after my password, tried resetting ,restarting, restore...my internet is connected...the date and time in setting is correct too....just not having any luck signing in. Apple Support gave me tips on fixing the issue and I've tried them all and still no success. Is there any other way, I can try to make this work?