Immobiliser help please

[Finella]

Not sure how but I think I've activated the immobiliser to lock and I don't know how to unlock, I can't move the steering wheel and have a symbol showing a steering wheel with up and down arrows and press clutch which I've tri d several times, Nissan advised to pull steel  wheel as hard as possible but nothing unlocks can any one advise what to try before I call out a mobile mechanic ? Thank you 

[Trevor]

Not sure of the age of your Micra but also is that an immobiliser key showing in the photo (yellow item)?

[Finella]

I ended up calling out mobile mechanic who did a combination of things to quick for me to follow but it worked and now unlocked, the yellow thing is my seatbelt cutter which is on the keyring