Looking at your pics, I think I know what happened.
The wire lugs have a little notch to secure it in place when you screw in those tiny screws.. from your pics, it seems they were installed in the opposite direction and so the screws werenāt catching the notch eg even the wire lugs look rather chewed up.
The pic below will show you what I mean.. I have changed the straps on my radiomirs many times, itās quite daunting at first but after some practice it gets easier. Hope Panerai can offer you a reasonable solution since this is clearly an error on their part