I hope you can find a way to convince your husband to accept help. Maybe through other channels. No offense but I suspect you are a real broken record and he has pretty much tuned you out. A friend, relative, or someone else he has a relationship with would be worth a try.

At least here in the USA, trying to obtain power of attorney is very difficult to do unless a person is obviously incapacitated or of unsound mind.

Maybe a bit of trickery might be justified to get a release but only you can think through something like that.

Good luck.