Wow that sounds like a nightmare. I’m hoping since it’s really only one string that’s all it is. I imagine yours was out of tune across all of them. With something that major with an instrument of that cost I would probably lose a lot faith in that brand. Actually I have had a similar(well not that bad) with Rickenbacker. Got a 4003 where the truss rods were not installed properly so they didint work correctly. They corrected it but I later sold it. Left a bad taste.