Drum brake issues

Soooo you took it to the wrong shop, chit happens. I do doubt the hub was bent though. The drum wall is thin enough to distort with a hammer or press. The hub flange is much more substantial. The hub might have been floating ( no force directly applied ) anyway. That's "how to" bend a drum. That drum might be straightened if the labor doesn't outweigh the cost of a new drum. The real challenge is sourcing the left hand thread studs. Going to all right hand threads is the simplest solution. Good luck with it.