My Yahoo email account has been hacked and when I see the IMAP activity, it is showing 10 accounts from various countries across the world. The hacker is able to read my email and also sending emails to random email IDs. I have enable 2FA and also changed password multiple times but nothing has happened. Please help me Yahoo!

The hacker is trying to get into my Instagram and Facebook accounts as well. I also received email asking for $500 through bitcoins. Please help ASAP