Depends on how badly you've threaded it or how much metal has come out.
I would get someone with a proper tool (Campag/Park) to chase/re-thread and re-fit. Doesn't sound like you've put the bb all the way in by swinging off a tool (which I have seen before). Gut feeling is that it will be ok. Seen some horror BB shell's in the past and still been able to sort.
Doubt the threads weren't correct but sometimes paint etc just stops the correct thread biting – hence why you should chase out.
As stated….think you'll be ok as long as you don't bodge the re-thread/chase.