Peugeot 307 Economy Mode Active, Car Not Working

Hello, my car was suddenly at P level in automatic gear. The vehicle is now giving an Economy Mode Active warning. In the battery etc. No problem, I took an electrician and checked it. The vehicle does not start and the gear certainly does not move from P level to other levels. Neither the radio nor the air conditioner is working now. Interior lights and displays only. We tried the battery. The electrician even tried to boost it, not from the battery. Because the battery is zero. The electrician says he deleted this car software. The software should be thrown. I could not be sure how correct. Today the spare part is off, tomorrow I'll buy the brake switch and try it. Why else does it?

As I said my brother, he may have oxidized his brain, I think there are these cleaning sprays, he can not get the commands because he oxidizes it without damaging the electrical parts.

I had them checked, master. All fuses etc. The sockets but it's okay, said the master. He also sprayed that spray himself

P position is not parking, I know it works in N position, I did not use it automatically, but fully automatic works in P position. Works at N in semi-automatic brakes