disable pinch to zoom, but allow panning on touch screen

I am building a website that runs in IE10 only on a touch screen (kiosk) running windows 8.

One major usability flaw I cannot seem to disable is the ability of the user to pinch and zoom the content. 

I found "-ms-touch-action: none;" to work just fine to disable pinch to zoom on static content. But if the page needs to scroll vertically, I must allow y-axis panning ("-ms-touch-action: pan-y;"). When I add this, the user is able to pinch to zoom again, which breaks the experience.

Any ideas?

thank you