Yahoo would not let me sign in

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.