Originally Posted by Dugan

It's not the host. You need to contact your registrar because even though you've set your nameservers to the correct one. When you run this command in linux if you have access to a server (not your registrars server) you can see the nameservers flip flopping or just not existing at all:
dig -t ns xxxsextube.club

That will give you a response for what your nameservers are set to at your registrar level. If those are not consistent then there are deeper issues that only the registar can fix for you.