OK… when you say “I have marked ‘No'”, where exactly did you do that? I know you can do it from your Community profile (Community -> Profile -> Settings), but I’m wondering if there is another place as well.
I believe I have found a solution. I added a little plugin that gives you control of all your forum notifications. Kay, if you go back to the exact same spot you went to before, at the bottom of that profile screen you will see some new options that let you turn off all notifications from replies to your posts and so on. If you wouldn’t mind trying that out and letting me know if it works, I’d very much appreciate it.