Invalid password for yahoo id

Hello,

i have a big problem in signing my yahoo id coz my password] is invalid .I also forget my alternate email and security questions and everything because it has been two years since i last used this account whenever i tried to sign in there always theyre telling my account is activated and well wait for 12 hours but its been a weeks since im waiting unti now its still invalid.Please me how can i access to my account very badly.

thanks ,