I've kinda got the same thing going on.
I've got 2 atties that came from cignot.com. They aren't producing much of anything. Vapor or flavor.
I've been using the 510 for over a month now, and have had some great success with it.
I direct drip, and have learned when I need to refill, how many puffs per drop, and when its flooded out. (i could possibly be getting more nicotene absorbed through fingers than inhaled!)
A couple of my older atties are still functioning great. I only broke out some new ones so I could dedicate an attie to AFB from Tasty vapor.
These 2 atties are getting very frustrating. I understand your anger. I am trying to keep them rotated out so I can see if they need some break in or whatnot. But I can keep rotating them with ones that work fantastically. If I didn't have those I would be screwed.
One of them is wierd, If I put too much liquid in, it wont vape, but nothing leaks out the holes either

It will only vape after I blow it out and then produces flavorless vapor for 2 puffs and then no more vapor. So you add some liquid only to find that 2 drops is too much, blow it out again, add 1 drop and you get 2 flavorless vapes. Tito's WAY confused.
I havent contacted Cignot yet because I'm trying to figure out whats wrong.
I understand if you ordered another brand, but if u cant return it, maybe order one more set of atomizers just to see if it works. Cause trust me, if you can get it to work properly. the 510 is a great piece of equipment