A combination of an unproven offer + unproven lander and bad choice of GEO (maybe).
Get a subscription to a good spy tool to see what's hot.
What about clickthroughs - did you get any from the landing page?
I'm not jenius - but here's what I'd do to check.
Is your ad congruent with the lander?
Is the copy on my lander good? - meaning how could I make sure their emotions have been struck with a lightning bolt. What will the formula do for me? Will it make me feel/look young, vibrant and confident? Will it get rid of my blemishes in 2 weeks? Why should I choose this one over anything else, or nothing at all?
Just a couple things I'd check.
What are the stats of the offer itself?
400 clicks and no conversions. Drop it and move on.
Test, test, test as many offers as you can and upscale fast once you see something is working. Drop it fast once you see it doesnt. Keyword in AM is fast.
Before you drop anything always figure out WHY it did NOT convert.
Knowing why something doesnt convert is just as important as knowing why it does.
If you cannot figure out why, you are not growing and you will inevitably repeat mistakes.