There are several other companies in the US rebranding and reselling Chinese machines. Full Spectrum, Boss Laser, Rabbit Laser do exactly that. They even have some loyal supporters in this forum who sincerely believe they are innovative American companies
Since the machine haven't been purchased directly from the Chinese factory I doubt the factory would provide any aftersale support. G. Weike assembles their machines with off-the-shelf components so you should be able to find parts easy. Of course, repairing the machine would require some knowledge and technical skill. If you don't want to mess with that it may be better to sell the machine and buy another one with good local support.