Axe Sharpening

[Dojo97]

I bought a 2.5lb long handled axe for £13.00, I wanted something similar but cheaper to the GB Small Forest Axe. I like the weight and the size, and the price is good. However it came blunt, I have been trying for hours to sharpen it with a machete file, and either side of a Falkniven DC4 stone (Using it dry). It seems to get a little sharper, then i do it some more and it goes blunt again, I am just doing it with my hands, no clamp.
I have no clue about how to get it sharp, and I think it came with an edge that is too obtuse, too large an angle. I have no spinning stone grinder thing. Helps please.