Help dealing with Yahoo email, please?

I am very new to this Forum and have been learning a lot just by reading.

One thing I realized is that my main email account, which is with Yahoo and was set up almost 10 years ago, has a password that pretty much anybody who vaguely knows me could figure out. Back then I wasn't thinking of security, I was thinking of how to make the answers as easy to remember as possible.

When I went to change it, I realized that my password challenge question is just as easily figured out.

I have been emailing Yahoo back and forth stating that I want to change my Password Challenge Question and I'm either told it can't be done or I get the form letter just telling me how to change my password.

Any ideas who I can contact at Yahoo to let me change my Password Challenge question?