Decent red dot, customer service at ade non-existent. - ADE Advanced Optics RD3-009-2 Red Dot Sights

I recently purchased this sight to modernize my old Smith and Wesson, Model 22a. Upon un-boxing, I discovered a huge thumb print on the sight glass, and also noticed the battery was already installed. This led me to believe it was a re-box. I sent two very polite emails to ADE to determine if I should be concerned. I never received a reply. The installed battery failed one day after installation. Otherwise, the manufacturing appears good, although the sight in manufactured in China, not in the US as the flag on the side might indicate. I am sure it will be fine, just concerned by the lack of communication.