Is your insulation fine? Are you sure? If not, then contact someone who knows this stuff and make an appointment. Hmmm… how about the thermostat settings? Do you know how to use it?
This is exactly why I’ve stopped shopping tools at Lowe’s. Every time I’ve given them a chance, I end up disappointed. For hand tools or power tools I would prefer home depot, Lowe's basically feel like home improvement section of walmart.