Is this your first mod/RDA? Have you had other builds that were more successful? Know anyone with another mod to try your IGO on?
Not to sound like a ...., but my guess would be a poorly built RDA... and in this case, too much air. As a Dingo owner, I can tell you that unless you got a lemon (haven't heard of that with Atmizoo stuff before), or your charger isn't working well (fairly unlikely)... you probably just need to learn to build your RDA's better.
Practice practice practice. Then practice some more. Build a coil and vape it for a day. Then re-wick it slightly differently and vape it for a day. Then build a different coil and vape it for a day. Re-wick it and vape it for a day. Do it again. And again... sooner or later you'll get it.
But I must agree with the other posters... you dropped $150 on a mod, spend the $60 to get a good charger and a cheap(ish) multimeter.