Email Hacked

Somehow my email was hacked on April 22, 2025. They were able to access my contact folder of several hundred people’s emails. I had a friend in cyber security look into this but I need Xfinity to look into the breach. There may be others who were hacked or even worse, Xfinity as a company has a breach. Can Xfinity on there system reach out to all of my contacts with a simple email of “Do not respond - Email Hacked”

Thank you for your immediate Assistance,