So, after I've tried to sign in with the id and password that I know that are right(because I've used the email like 2 days ago), it suddently wants to verify that it's me the one that tries to sing in, and they're trying to send a verification code to my mail.(I think it's the 2 step verification but I never used one, nor asked for one, so I guess that my account has been stolen). The thing is that, I can't see that code because, duh, I can't sign in. I've tried to reset the password but that does not work either because it seems that I've provided a phone number that I no longer use. And, of course, there is no way to contact anyone from yahoo. Any ideas? I really need my email, but if I can't recover it, I want to at least delete it, which, again, is currently impossible.
To everyone who couldn’t access their account despite knowing the Yahoo ID and password because the alternate email and mobile number are no longer valid, I recommend trying to access your account using the Ymail app instead. It worked for me, and I could only hope it would work for you, too.