N9005 Encryption Failed

Hi Guys

I'm selling this note 3 so followed advice to encrypt the phone to protect any data on it from recovery.

The processes staled after multiple hours so I restarted the phone and its not stuck on the Encryption failed screen and the reset device option doesn't work.

I tried using TWRP to erase all the data on the phone and tried flashing a new rom but the message remains.

The phone was on a custom lollipop rom and has now been flashed to the latest omega rom.

Any one managed to resolve this on a note 3 ?

Thanks

Richie