Cactus is dying. Help!

[mj5181]

My cactus has been having issues for about a month now. I tried to replant it a month ago, but it fell during the process and the top split open a little and the cactus bent in the middle. I gave it support and hoped that the top would heal. Unfortunately, the top turned black and got mushy. I cut it down and put some cinnamon on it, but the top again got black and grew mold. I tried the same method, but just cut a little further down. It still didn't work, and yesterday it folded over on itself. I tried today to cut it down past where it had gotten mushy in the middle without my knowledge, but the bottom does not look very healthy. There was a middle piece that I was able to cut out that seems mostly healthy. I dusted the ends with cinnamon and was wondering if I can maybe replant it? Do I need to let it dry out or should I replant immediately? And is there anything that I can do about the bottom part? I've attached some photos below.

[greenknight]

You need to let it heal before you plant it. It doesn't look very promising, though, there appears to be a bit of discoloration in that cut end - the rot may already be into it.

As for the base, you have to cut off anything that's rotten or discolored. If there's anything left after that it may grow a new shoot, but it may be too late.