South African Granny stuck in New Zealand

My mom Realda Kilian is a pensioner from South Africa that came to visit her grand kids in New Zealand in February. She was supposed to fly back to South Africa in March but her flight was cancelled due to the lockdown.

She came to New Zealand with Emirates via Dubai. Emirates is still not operating.

There is a handful of repatriation flights going to South Africa but its is way too expensive. There is a flight now in June that is a bit cheaper but its about $2000. We dont have that kind of funds available and we need help please.