Renault Megane dymanique 2003 dci?

I have got in my car all as normal started the car did not realised it was left in reverse ( by idiot cousin) started to chug I put in the clutch and took it out of gear after it had stalled took the card out and had no dash lights put the card in pressed start button and nothing I got out of the car locked it unlocked it still no dash lights and still won't start checked all fuses and disconnected battery left it for 20 minutes re connected it still nothing! I have tried pressing button on key card a few times and pressing the brake/clutch when pressing start button still nothing please help! Central locking working hazard lights working but nothing else.