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If you can somehow quantify the value they are receiving you can file for damages. There is a civil action for unjust enrichment which deals with gains made by a party for which they are not otherwise entitled at the expense of the plaintiff. This action presumes no contract was in place.
There might be an action fraud or intentional misrepresentation by using your licensing to establish business. The issue is that it may be difficult to establish you are the one defrauded.
You can also ask for an injunction to stop best Buy from using your license/name as the basis for obtaining business.
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