I'm not sure how Amazon works. If you had bought it off Ebay and the seller is an authorized dealer by say Bushnell, then Bushnell would accept it. Some dealers on Ebay also offer a warranty. I would contact Amazon giving your purchase receipt number or invoice number, and date of purchase. If they will not give warranty, they may have the name of the manufacture or owner who they sold the camera for.
As a suggestion, if you haven't already done this: check the batteries with a digital meter. Any battery that reads 1.0 to 1.2 volt, the camera will not function properly, or not at all. Even new batteries, fresh out of the package may have a faulty one. The best of luck.