Google doesn't charge anything to be 'listed'. If you're talking about the Google Adwords program or the Yahoo! Search Marketing program, then you're responsible for those Pay Per Click ads and you have the right and power to change them.
If your Yahoo! Directory listing is not correct then you need to put in a change request to get that changed. You can look back at the email you received when you paid for your Yahoo! Directory listing or go here.
hope this info will help you
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