First off all is all power on to the equipment, that must receive internet?

If Yes. Is your phone of laptop device wireless on  and connected to the router?

If Yes, Can you open command prompt and ping google. Click on Type here to search - CMD (Enter) - ping google.co.za

If repondse, know that line is slow. More than 1 issue can cause if from kids that download a game to cable fault under the sea.