Nighthawk ADSL modem router issue

Hi,

    I am new to this and have signed up because I have just bought a Netgear WifI ADSL modem Router.

Model is a Nighthawk AC1900

I bought it to replace my Sky router as that wasn`t handling the traffic in my home very well.

I have linked it up to my latop and can see everything is working fine.... apart from the internet connection.

I cannot get on line. The internet light is orange.

Please please please can someone either help me or point me in the right direction

Thanks