Finally, I nailed it!
As there's no other option than pry open these panel, I use a dull knife (which I regret a bit) to crack open a small slit from the side of the ventilation panel then using a steel ruler to poke that slit and voila..!
some tips: first: you won't need to open the glovebox its a waste of time and energy, second: after you pry open the left/right side of the ventilation, make your way (using ruler or any hard and thin object ) to the bottom of the ventilation panel then pry the second clip.