Replacing Strut Insert(HELP)!!

So i started to replace strut insert today at a hobby shop on base all the tools i needed were there. So after the car was lifted and i took off the wheel i tried to realse the tie rod from bottom of the strut that is connected by A weird looking nut/bolt.

{THIS IS WHERE THE PROBLEM CAME INTO PLAY}

The nut that holds the tie rod and the bottom of the strut into place keeps spinnig as if the bolt/nut diddn't even get loose and the stud and threading itself is spinning inside the bushing and nut at the end tie rod.
I also noticed that on top of the nut or i should say stud is a hex shaped but it looks like its stripped i couldn't get the hex wrecnh to loosen it so im really lost on what to do i believe its a self locking nut which means one time use which only cost a dollar or so but how do i get the nut off tie rod end and the bottom of the strut??????

Is there any other way to replace the strut insert without disconnecting the tie rod end???