Toll free numbers can generally be called at a national level. In other words, toll free numbers in New Zealand can be called from within NZ only. However, in some cases it is possible to dial a toll free number from abroad, but of course there will be regular international charges. These being said, if you have a NZ toll free number starting with 08 try dropping the initial zero: 011 64 8 and so on. If it doesn’t work you need to find a regular contact phone number for this company.