Tried Chat that does not work. Having same problem. verizon.net email compromised unable to change password on email. Changes My Verizon only. Chat tried with no luck. Telling me that Yahoo is working on the problem. I went in on my verizon.net email and removed all contacts to stop spam being sent out to my contacts.
Had this problem , talked to Verizon, nothing helped. Couldn't even change yahoo account as it was deactivated. Changed Verizon password many times in My Verizon, nothing helped, and account kept sending spam. Then one day in trying to fix it, I cleared the cookies. Could not access email now. In My Verizon, at the very bottom is the word email. Clicking on that it let me in to my email, but would time out. The next morning, clicked on email and it wanted password. Used the latest MY Verizon password. IT WORKED!! Changed my ipad to the new password and IT WORKED!! Hope it works for others.