Yahoo account key

how can i go back and sign in to account in yahoo, now i remember my pw every time i put my email and pw it shows my gmail account and account key and i put the one they sent me it wont work. I am decided to delete all my account but i won't let me .
How can i retrieve all of it and i wanna see the regular login that i can see forget password i counldn't see it anymore . i spent half a day to go back and see the log in i am so even i wanna delete it wont let me. i am so frustrated. I just wanna delete it all and open new one. still won't let me