Mart, the site owner owns the domain name only, they have to have a hosting service to put the site on the internet unless they happen to have their own server which most sites do not, if this makes any sense to you.
PowWeb is a hosting service that broadcasts web sites on the internet, if your site has a poor host, you have a poor web site, get it?
Bottom line? It might be time for domain owner to shop around for a new web host.