@geerlingguy yes that is your voice, and your voice is your brand; it conveys confidence, expertise and friendliness which you converted into viewer trust and perhaps revenue by all your own efforts. They wanted all that for their product without paying you or asking you. It's sleazy theft, not an honest mistake. An honest mistake is if they had hired you for promotional work and thought that includes your ai voice. You also earn an apology and compensation for honest mistakes. Just ask them.