iOS 11: Voice Control doesn't get turned off completely

I recently updated my iPhone 6s from iOS 10 to iOS 11.2. Together with the update **the device started really annoying me by turning on Voice Control on headset button press**. It gets turned on approximately in 30% of the cases. May be it reacts on a longer presses, but anyway I'd better turn this off. I used to use this button to play/pause music and it worked perfectly with iOS 10. I also didn't change my habits - I press it in exactly the same way like I did it before. Voice Control itself is turned off on my device. I used the "Turn off Voice Control on your iPhone" article from the apple documentation to ensure I did it properly. There is also quote in the documentation: > If you're using a headset, and it unexpectedly activates Siri or Voice Control, make sure that your headset is fully inserted into the device. But it is not my case - the headset is fully inserted. I'm also using the headset provided with the device.