@juliana
I'm sorry to hear that you're experiencing issues with changing the voice provider in the dashboard. It sounds like there might be a problem with the voice provider selection or configuration. To assist you better, I would recommend reaching out to our support team to investigate the issue with the call ID you provided. They can look into the backend to see why the 11labs voice option isn't appearing and why there was no voice on the call request.
Please ask support for more info on this, and they will be able to guide you through the necessary steps to resolve the issue.