What options do I've left?

[Conrad Rossi]

Hello,

The rear left axle tip where the castle nut bolts on to keep the brake drum in place is bent and stripped. This explains why the seller gave the nut, washer, and cuttle pin in a bag when I bought the car. Lesson learned. I should have tried it to it back then. I didn't think anything of it because he had taken apart the front brakes and they were bagged as well.

As you can imagine it doesn't thread back in. It's bent enough the nut cannot "turn" when it's fastened.

What options do I have? Any tricks? Probably I'm not the first one having this issue.

Thanks.