Cartisan EVO Vape Inconsistent Pulls

I just got this new Cartisan EVO Vape, ordered from their website, out of the box I got no to little pulls. I would preheat the cart and get somewhat of a pull but nothing. It wasn't after MULTIPLE hits and preheats did I get a decent hit and it's been that way with every cart since. I thought that it may be the cart, but it has to be this battery its way too inconsistent. Ive tried voltages from 2.8 to 4.2 and get the same results- sometimes a good hit after multiple attempts to get a pull.

Ive done the unscrew it a quarter trick, ive screwed it all the way down, I've pulled my cart pins a little more out, I've pulled the internal pin on the battery a little more out and nothing has changed. Anyone else experience this with this battery before I exchange it for another one with customer service? Or should I get a refund and get something else?