I ordered two flavors, the blueberry blackberry, and the dragon melon. And both are awesome. Cheaper than going to the store, they work wonderfully. But my dragon melon won't charge. It just keeps flashing on screen, the other unit will fade off and on the charge icon but this one just blinks? I've tried 5 different chargers and left it over night and nothing changed. Is there any way to return or exchange? My email is [****]