Hi,
First time I've got this plant. And judging by the the feel of it and the look of it, it's got some sort of rot and is on its way out...
Branches have gone all squishy and soft, and even just poking around on it, it has fallen apart almost abd torn off.
Posts
Try taking it completely out of the pot and getting rid of all the soil.
Let it dry off for a day or so and you may me able to save some of it if it is not too far gone.If OK then repot in a gritty soil but don't water for some time.
Good luck!