Audi engine won't shut off
 

Hello, I am new to the forum. I have really weird issue with my audi a4 b8 2009.No matter how many times I will push my key, the engine won't turn off.

At first it took a few minutes of pushing the key to turn it off. Then it took more and more time, maybe hours. Now it's totally not working. At audi official dealership they first replaced the ignition lock, the part where the key enters. Then they replaced elv module that's connected to the ignition lock. They thought that will finally fix the issue but unfortunately even that doesn't help.
​​​​​​Did maybe anyone had a similar issue? I am totally hopeless.