So often, I have found that there is an underlying belief that if something is just ignored, it won't happen. And so often, I've found that my actions have supported that underlying belief. I've made threats (even in the form of rational, adult conversation) and then I don't follow through to assert my boundaries. I mean...how often have you begged him to stop drinking, rationally explained that you can't stay in a relationship with an active A, had him rationally agree that it was done...and then go back to the exact same patterns just days later? Personally, I've danced to that tune hundreds of times. It was finally up to me to refuse to get on the dance floor and mean it.
You will probably have to assert yourself again on this point. If that doesn't work, like Laurie said, you may have to take the action yourself.
My best to you. I'm sure this is frustrating.