I got a new frame for a project.
I tried to install the bottom bracket but it became stuck at some point. I had to use a lot of force to remove it...
One she'll has been destroyed but the threads on the frame seems not that bad as I was expecting. Basically I had to remove one turn of the shell's tread from the frame itself.
Now the frame have this Grove and I can't fit manually a new bottom bracket on the left side.
Should I contact the seller? Was the bottom bracket faulty? Ovalized or uncleaned to cause this?
Should I install a new cup forcing in? Or should I make a tread cutter from an old cut?
I don't know if that was my fault, honestly I assembled lots of bikes and I can't understand what I done wrong...
I'm in fear in case I've done some huge damage.
Please check the photos below.