are you sure this graphic image is the actual brand logo and not just some decoration?
i've never seen that as a logo in 20+ years of shopping cases.
link images of the entire case directly to this thread, not just the URLs.
there should be a small sticker located somewhere out of sight with a brand, serial number, UPC, ...
check all around the back of the motherboard tray, underneath, inside any PSU shroud, inside the front panel, inside the side panels, etc.