If you’re stuck in Yahoo Mail issues, then follow the steps
to troubleshoot them:
1. Run a scan on the Yahoo account.
2. Move to the tool of Yahoo Mail
Quick Fix.
3. Choose the issue you're having.
4. Enter an alternate email address.
5. Then, Enter the shown verification
code.
6. Click on the Create Request.
Go for Yahoo
Customer Service instantly if there’s no improvement in the
situation. https://www.numbersfor-support.com/yahoo-customer-service-number/