[One hit drag?]

Now if I turn it to minimum air flow I can get multiple hits but when it's at max I get one hit with the blinking light 

[One hit drag?]

I purchased it on Saturday 3 days ago the gentleman at the shop put it all together for me and I only refilled it once since then so everything is new. He told me to change the coil every 7 to 10 days.. it blinks 3 times after one hit 

[One hit drag?]

It's ego aio all in one 

[One hit drag?]

My vape pen only lets me get one hit.. I put it on the charger until light turns off then when I go to vape it only lets me get one hit then blinks.. what to do??