Other people have had good experiences with NZQA but when I fast tracked our application last year I tried to get in contact with them after the estimated amount of time had passed only to find out they basically hadn't started. They wouldn't confirm receipt of our documents after 8 weeks after I knew they had arrived (as that would mean they should have started), but were more than happy to talk to me when I asked for the documents to be returned (we ended up not needing it as the US university was on the approved list, basically I was dumb). They were also really good about getting me a refund.