A few questions:
What kind of laptop are you using?
Did you shoot in RAW or JPEG?
Did you shoot using HDR?
Which piece of the image are you using as a reference point for your WB?
Here is what I came up with for you; it's not perfect but it's a start. There would be a bit more latitude for adjustment with a RAW file handy, but the main issue here is your shadows are too bright. With a curves adjustment layer, bull down the middle of the curve significantly and the image begins to look more natural. There are some red casts in the sky (why it looks purple to us), which another curves adjustment can fix.