Yahoo email hack

Hi my husband and I have a common yahoo email address which is removed by moderator@yahoo.com. Then the other day he lost his phone wherein all his email address are log-in. Then one of our friends states that the hacker seems to be using the email add to do transactions online.

Can you help me resolve the issue? The phone number and recovery email has been long forgotten for we actually did not have any problem with this email before.

Please please badly needed your help with this issue