Good morning @saturnzoon   Hearing you loud and clear about downfalls of NDIS.  And this week it was announced that millions of dollars of budget allocated for NDIS have not been spent.  Outrageous.

Re : rejections - I went through initial application, submission of further supporting evidence, internal appeal and eventually external appeal through the Administrative Appeals Tribunal (you have to have the internal one before you can do this).  It's not an easy road to walk but it is worth persevering if you possibly can.  You can get a Disability Advocate for free and mine was a massive help.  They got me a legal aid lawyer too.  Eventually NDIS conceded and accepted me only 2 days before the hearing was scheduled.  Google Disability Advocates to find one in your state.  I really encourage you to give this a try if your review is rejected.  

Take care.