dude u gotta be quite assertive with it, there are times when it might feel like the dash is gunna snaap, but u just gotttta keep pulling,
the method i used was to push up from under the foot wells then kinda try and pull it out, if u can see the the 2 clips that hold the side of the dash and the way they clip on it might help understand they way the top ones work.. they are a little different though i think,
if all else fails take the long black air vents out the top of the dash, and maby get a long screw driver to get a bit of leverage on em, u can just about see them thorough the vents
try not to let them clip back in once u have released them, and although u might not want to be prepared for them to snap, there easy enough to change,
hope that helps