I've had my Smok vape pen 22 for a little less than a month and recently after i unplugged it from charging it stopped working. Everytime i press the button to take a hit it just blinks 4 times, which is supposed to mean that the battery is getting low, but i know that it is fully charged. I have already changed the coil and cleaned it and it still doesn't work. Any help will be appreciated, thanks.