Closet door

I'm not sure exactly what the problem is without more context, but going just by your photos it seems the pins have come out of the brackets in your track. Are the brackets missing entirely, or did they just disconnect? It also looks like your track is damaged, so replacing that would be a good idea.

Can you explain to me exactly what the issue is that you're facing? If you do need new tracks, can you tell me the size of the end profile of your original? This will require you to remove it, but it is an important detail since we want to make sure we can get you the right size.