The host 'IP Volume Inc' can be changed by the scammer who's phishing, but the registrar will remain the same 'Tucows', I sent them an email yesterday night and am waiting to hear back from them about it.

I think I'll wait a few days to hear from them before I proceed to ICANN since they mentioned they're assisting with the case, but still, the Registrar's inability to suspend the domain does raise some bells.