Rent 4 Keeps is being sued by ASIC over avoiding protections for the vulnerable. But beware of rent to buy in general.

Also watch out for OpenPay, I almost signed up to cover my cat's vet bills but was thankfully able to manage.

I haven't personally used No Interest Loans from Good Shepherd so I can't speak to how safe and legit they are, but if you're in some unavoidable difficulty they don't charge interest and on the face of it do seem a bit less predatory.

https://news.nab.com.au/news/nab-and-good-shepherd-20-years/