Ok so everything has been said already so I am just repeating it but I feel sorry so I have to .
You were granted residency two years ago right ? This is YOUR visa in YOUR passport , you dont need your ex to sign anything and you wont be send back .
Just go to INZ Office please and take someone that can translate for you they will tell you the same things that have been said here .
Another thing the visa will let you stay in NZ forever , permanent resident is just so you can travel you wont be thrown out in November if your travel conditions expire just dont go travelling before you get the permanent resident visa