Old Bellsouth account, can't change recovery emails

Someone keeps using my account to send spam emails, I've tried changing the password several times to no avail. I think part of the problem is that the recovery options for me are messed up; I am unable to add or remove recovery emails/phone numbers and there are some clearly fraudulent emails set up there.

This account is an old account, it used to be Bellsouth, then I guess ATT absorbed them, and now I have to bounce back and forth between the yahoo login and bellsouth login when I try to view/change these account settings and then it just doesn't work. It's very frustrating. I've included a screenshot of the 'recovery options' part, when I click "edit account info" at the very top of the page (not included in the screenshot) it just brings me to a page where I can change my name and that's about it.

The recovery process from Yahoo says that I should be able to add or delete these from here, but I can't interact with them.