We have Woosh wireless broadband & we also have our phone through them too. I was very glad when we ditched our Telecom phone line as we were paying $40-odd a month for next to nothing.
I *think* our plan costs us $48.99 a month for 1100MB (1.1GB??

). We (well it's really only me) seldom go over this amount each month but we don't download anything much.
I would highly recommend looking into Woosh as we did a lot of research when changing to broadband & what we have now is actually cheaper than our old Telecom phone line & an unlimited dial-up plan. Only thing is they may not have coverage in Waiouru but you can check
here.