Maxi Cover DOESN'T Cover

Dulux Maxi Cover Wall and Ceiling paint is the worst paint I've ever used. I bought 5L of the white paint to paint a small feature wall (under my staircase). I am an avid DIY'er, so I know that painting white over a dark colour is going to require more than the standard 2 coats. But I am now more than 3/4 through the 5L and the dark colour is STILL visible. The wall looks "patchy" at best. This paint just does not spread or cover well at all!

Judging by the other reviews of Maxi Cover Wall and Ceiling - I am not alone in my experience and this paint has multiple issues. Please take this paint off the market, it is a serious waste of money! I am so disappointed to have spent money on this product.