Need Correct Nameservers

Hi–

So I have a domain that I purchased through UnitedDomains but I used GoDaddy to install WordPress. The problem is, when I try to visit my site from anywhere but GoDaddy, it redirects to another site. The site is built on WordPress, but the support staff at United Domains said that I need to attain the correct nameserver info from WordPress in order to direct my url to the correct site. (Hopefully this makes sense)

Is that something you can help me with?

The site in question is mycra.sh/app.

Thank you in advance.