I have had the same situation happen with our podcast. These people don’t stop they are our to destroy businesses and frankly, I blame social media platforms. Someone was leaving bad reviews on our Apple Podcasts page trying to “bring us down.” Luckily, podcasts are easier in the sense that our downloads speak for themselves and are protected from such pirates. My advice is to offer full transparency to your actual following and ask them to help you organically promote your page via things like reposts, shout outs, etc. help raise awareness around the fact that you’re being cyber bullied and harassed.