I know my log in name + I know my password. However I cant log in?!

I know my e-mail log in name + I know my password. I even know answers on my security questions! Wtf where are the security questions?! However I can not log into my email by yahoo!

I get following message!

Help us to keep your account safe.
We want to make sure that it's really you using this account. Choose a method below to verify that this is your account.


The problem is I no more have acess my my old mobile number!
Where are the security questions?!

How is the way to go in! I am trying to be not angry but it is impossible