You have to be logged into ZA Yahoo email account to post questions on YA. These spam questions are so obvious. I usually report questions like these, but I usually don't take the time to answer.
talk to yahoo about it
Unless you have set up a recovery method you won't be able to get your account back. This is how to recover your account if you have password/sign in problems: https://help.yahoo.com/kb/SLN2824.html