It was broken by the hammer and punch, not firing.
The pin is broken. No amount of soaking it in a solvent will help.
Which will damage the bolt.
The solution has been suggested, I will repeat it, cut the extractor through with a Dremel tool.
I have seen this several times over the years. You are hammering a pin and it is moving then it stops. It has cracked diagonally and now is acting as a wedge against a wedge and expanding against itself more with every hammer blow. When this happens you are not going to beat the pin out from either end unless you can somehow liberate one end of the pin.

