I purchased sigelei Zmax V3 at goodejuice for my friend and it stopped working after 2 weeks. It just says low load. Been using the same clearomizer during this span, battery is fully charged, and tried 2 different end cap. Tried to fire at 3w, 5w, 8w, and 15w without success. Contacted the vendor, but they won't return my email lol. Any help would be appreciative regarding this matter. Thank you.