How do i fix my v-brake with some part twisted?
The simplest solution would probably be to just buy new brakes. You can get them starting at about 10€/15$ which makes any attempt to repair them more expensive.

I don't know whether these tension pins can be replaced. For me, brakes are too important to try to save a few bucks on them.

Make sure the new ones are inserted completely, the pin should ideally not be visible when installed.