Do not waste a single minute and reactivate your Yahoo account before it gets permanently deleted from the Yahoo servers. To do the same, follow the instructions shared below
Open Yahoo Sign-in page
Provide the Yahoo email address, phone number and your recovery email address( if there is one)
Enter your password and click on Sign In
You will be asked to verify your account, if not asked earlier. Following this would end in receiving a recovery key at your registered email address or phone number.
Provide the key in the verification field
Click on Re-activate
It can take around 24 hours to reactivate the deleted account. In case you are unable to achieve positive results, then dial Yahoo customer service number and talk to the techies right away. https://www.email-helps.com/yahoo-support/