WOW-managed to chew up a good wrench?? Guess those chrome moly spindles are tougher than the wrench jaws.

This is a lost cause, but sometimes, you can get these things loose by working them back in forth over that one turn it will turn.Maybe the aluminum chips/spirals that are jamming the threads will eventually loosen if you work it back and forth- 1.1 turn in- 1.11 turn out-1.11 turn in 1.2 turns out- 1.2 turns in -1.3 turns out- repeat /repeat etc.

There is close to zero chance that the crank will be useful, but maybe the pedal will- AND NOW IT HAS BECOME A POINT OF HONOR-MAN AGAINST PART!!
If you have already tried the in-out-in -out-in out- sorry to bring it up again-and maybe with maybe a hand impact driver( it might have a allen(allan??) on the inside, not that I expect an allen-5-6 mm of steel- to not snap off- but....

It is a Lost Cause-you have more sense than I do. I would chase this lost cause until a broke a couple more tools-then I would cut the pedal out

Frame this crank as some sort of cautionary lesson.
Luck
Charlie
PS You could also POUND,POUND with a thick flat punch(or allen with hand impact impact) on the inside end of the pedal -hope to crack up/deform/distort these " hand forged" new threads-go both ways-