How to disengage NAT (anti theft) system.

Seems the NAT (anti theft) system has activated and now i cannot 1. Unock/lock doors with remote. 2. turn the car on reds/accc with push start button.

Ive disconnected battery for a few minutes then put it back on to no avail. Checked the voltage on the battery and its reading 13v.

Dont know what else to do.