Bests & Worsts Reviews from Amazon

What a piece of Chinese junk. Missing hardware, welded nut misaligned with drilled holes and stripped the bolt. Now the bolt won’t tighten or come out. How do I get parts to replace what’s bad or it’s coming back. Update 8/4/18: I received a reply on 5/25/18 saying they would ship replacement parts from China. It has now been more than 2 months and still no parts and an unusable $200 piece of equipment. Is someone swimming from China with parts or did they just lie to keep me from sending it back?