The one thing these people care about is money. Knowing that, do you think they care that much that these protests are happening in general? No, they don’t. They will care if it costs them though. You need to make the cost of not listening high enough that they learn that you can’t be ignored. If you’re just nice and polite they’ll pat you on the back, tell you you protested “the right way,” and move on. You’ll never get anything out of them.