For what it's worth, I bought one of those things for my 17" MacBookPro, for location work. Sounded like a great idea in theory, but in practice, it created massive heat; was a pain to keep running and charged; sometimes it worked sometimes it didn't; acted like a giant anvil on location; and after a while, would just not take and hold a charge. I finally threw it in the trash, and felt relieved, even after writing that large check. I'd suggest simple extra batteries designed for your laptop, and get one of those chargers that recharges two batteries at once. Much more efficient, on location.
You might be having trouble contacting this company, or, this might be The Universe telling you to just throw the thing in the trash, and get on with your life.