Trouble with access on site

Hi all. I launched my online shop yesterday and i have found there are some issues with people on the site accessing the men's and the kids area at the top of the page. They are either getting the 400 bad request / error or We couldn't find this page you were looking for including there could be an error with the URL. 

I'm not tech savvy at all and I don't understand why this is coming up and I don't want to deter people from going onto my site.

Any help would be great.

Thanks Janine 

For forum users to help, we'll need you to provide a link to the pages on the site.

Thanks for your response. I will do that next time. After extensive messing around i have fixed the issue. 🙂