I cannot login

Since three days i am trying to login my yahoo mail ID, it shows

Confirm Your Identity: Receive Verification Code
You are logging in from a device we don't recognize. Learn why
For your account safety, please choose either a listed phone number (carrier charges may apply) or email address below to receive a verification code. Learn more
By phone SMS Voice | +91 xxxxxx1239

Receive Code

Actually the problem is now i don't have the above mentioned mobile number then how can i receive the code and the message shows or email address but there is no option for e-mail address, i request you to please help me to get out from this issue, since i have lot of things to do with my yahoo account.