Keystone Vapes Leaking

Recently purchased a 4-pack of vapes that were on special from OneDayOnly. 3 of the 4 devices begin leaking before the tank was even half empty. 2 of them now refuse to switch on or charge at all. The leaking is so bad the charging port is full of liquid. I have reached out to Keystone directly and to OneDayOnly and was met with silence. I DO NOT recommend anyone waste their money on these devices.