Call regarding better electricity deals. Had old name and postcode. I asked for their ABN or ACN. They told me they are not allowed to supply that information to which I responded that it is publicly available information and that callers must tell you who they are and the business they represent at the start of the call, and they must provide contact details on request. Refusing to identify themselves or their business breaches the Telecommunications (Telemarketing and Research Calls) Industry Standard 2017. Nothing in that document about having to provide an ABN or ACN on request but usually enough to get them to go away.