Please advise how to delete my emails..I do not want to create a new account?

How to get money out of accounts 

Delete emails in Yahoo Mail

Get rid of old, unnecessary messages in your mailbox. You can delete one or more emails at a time.

Delete 1 or more messages

Select 1 or more messages.

Alternatively, click the Select All icon at the top to select all displayed messages.

go to sent emails. click delete. go to received emails. click delete.

https://help.yahoo.com/kb/sln28054.html

Yahoo phone help answers are scams.

Currently posting as - 1 800 ☏ 782 ☏ 3911

I don't know how to do that

You can delete up to 100 emails at a time in Full-featured Mail or 1 page at a time in Basic Mail. Put a check in the box at the top left of the message list to select all and then hit Delete: https://help.yahoo.com/kb/sln28054.html