Flooded with e-mail from Apple Support Communities

Even though I have set all my Email Notification Preferences to No, I am getting several hundred messages every day from "Apple Support Communities Updates" with a subject of "[Using iPad] - ..." This has been happening for over a week. How can I stop that?

I was 38 minutes into a chat session with Apple Support one week ago today, but it ended unexpectedly "due to a temporary system issue." I tried today to get back into chat but can't find it anywhere. It's as if chat support disappeared in the last week. That's why I am posting this message to the forum. I am obviously desperate to stop this unsolicited flood of e-mail messages.