Larry's Yahoo account was compromised and he couldn't get into it, so he contacted a company he thought was Yahoo. They asked him for money to fix it, but he still can't get into his account. Now they want more money. Leo says this is a hacker, and this is a scam.
This Yahoo Security Center page will help him recover his password and let Yahoo know his account has been compromised.
He should probably change his credit cards now too, because obviously they have his information now.