What is the frame material? It sounds like you stripped the bottom bracket shell threads (I assume it's English threaded). If it's a steel frame you could have the damaged threads built up with brazing material and retapped. If it's aluminum or carbon you are probably out of luck.
There are threadless bottom brackets that can salvage a stripped shell but they are square taper and would require a different crank. Here is one:
https://velo-orange.com/collections/...ottom-brackets