megane 2003 diesel manual 1.9 starting problems.

Hi all. Im having a problem with my 2003 1.9dci megane. I was driving it yesterday and when I pulled up I stalled the car so I didn't press the stop/start button to shut the engine off I just took my card out and left it and locked it with the fob. When I went out this morning the car opened with the fob as normal but where it usually displays "please enter card" on the digital dash it is displaying nothing. Even when I press the stop/start nothing is coming up. Can anyone help? Thanks in advance.