gear lever stuck and won't move

hello friends, my 2004 307 petrol automatic vehicle. it's been 1 month. yesterday, after starting the car to go to the market, he put the reverse gear in r and took it back a little, and then shifted to the n position while going d forward. I can't play the gear at all. The master said to bring it, but the vehicle does not shift into gear, so I got stuck. Why is it, what should I do? I'd be glad if you could help me out.

Probably the problem is the gear position switch is broken, sir.