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I think I’d start by filing a DMCA takedown.
It’s your voice, used in a way that you didn’t provide permission for it to be used. You would have never provided your voice and permission to use it had they been upfront about how it was to be used.
Lots of web publishers don’t exactly know how to handle a DMCA takedown and will just nuke the content rather than fight it.
Then I’d file a lawsuit for damages. Part of that lawsuit can include a requirement to unpublish any published copies anywhere, and destroy all non-published media of it.
