I'd be looking for a decent, used, American, European, Japanese or Taiwanese machine by now... That was my strategy when I went looking for my second lathe, I got a 1950's toolroom-class lathe, slightly scruffy with a couple of minor issues to fix, for less than a Chinese minilathe, although YMMV?
Having worked for an importer of Chinese machines, the OP's experience is unusual - he was offered replacement parts and eventually a refund - usually the buyer thinks the problem is THEM, not the machine!
I think many importers see "quality control" as "send it out, if they send it back we'll know there was something wrong (and sell it again anyway)" and don't bother making sure what they sell is usable.
Dave H. (the other one)