"didn't react to commands" is a rather loose translation. I heard: "Problème de commande.... L'avion s'est auto-fait n'importe-quoi."
So, control problem. The plane went and did by itself n'importe-quoi.
n'importe-quoi is not always easy to translate into English. Literally it means "it does not matter what". In many cases, it can be rendered by bull****.
Here, it means that it decided to do something that had no apparent meaning and was not helpful, like, for example, turning off the glidepath and diving.