Domain hijacking and fun fun fun

Well one of my new forums has been down now for a few days, every time i set the nameservers to what they should be they get magically set back to something else which is allowing someone to serve this page to my members: -

Which is nice…. and the friendly guy whos doing this is also spamming via email to drive traffic to it….. having had a poke a round hes doing quite a nice job of it too….

Anyhoo depsite my registrar telling me its my issue and someone has my password and login (Changed 4 times now) we have it sorted and a new host to boot