I have been trying ALL DAY to get on. Rejecting my id and pword. Keep getting OUCH/error. Even called corpo?

I have tried EVERY remedy. Need tech support. No one will answer. I am off and not able to log in. Keeps rejecting my id and pword. Even followed instructions to change pword. Still received and OUCH/error response. I have business negotiations going on right now with a Yahoo! contact. No one can reach me. I cannot reach anyone. Called corporate offices for Yahoo and they sent me to the same DAMN tape about help.yahoo.com. Where is a real person to get this straightened out?!!! Will not accept anything that I feed into Yahoo. I need someone to call 775-969-3201. Need a real person and tech support. This is unacceptable and it is affecting business negotiations that I have in process. Call me. Cannot get signed in. Greta L. Anderson (will simply switch to Gmail and leace Yahoo. This is unacceptable.